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NIFI-1763: Initial implementation of ConfluentSchemaRegistry. 

NIFI-1763: Fixed bug where the Confluent Schema Registry Schema Access Writer was not being created

Signed-off-by: Yolanda M. Davis <ymdavis@apache.org>

This closes #1938
This commit is contained in:
Mark Payne 2017-06-22 14:01:32 -04:00 committed by Yolanda M. Davis
parent a3b72f1bb7
commit 3906d4e1d2
22 changed files with 1334 additions and 67 deletions
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5
nifi-assembly/pom.xml
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@ -186,6 +186,11 @@
<artifactId>nifi-kafka-0-10-nar</artifactId> <artifactId>nifi-kafka-0-10-nar</artifactId>
<type>nar</type> <type>nar</type>
</dependency> </dependency>
<dependency>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-confluent-platform-nar</artifactId>
<type>nar</type>
</dependency>
<dependency> <dependency>
<groupId>org.apache.nifi</groupId> <groupId>org.apache.nifi</groupId>
<artifactId>nifi-http-context-map-nar</artifactId> <artifactId>nifi-http-context-map-nar</artifactId>

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nifi-nar-bundles/nifi-confluent-platform-bundle/nifi-confluent-platform-nar/pom.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<!--
Copyright 2016 Hortoworks, Inc. All rights reserved.
Hortonworks, Inc. licenses this file to you under the Apache License,
Version 2.0 (the "License"); you may not use this file except in compliance
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Unless required by applicable law or agreed to in writing, software distributed
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-confluent-platform-bundle</artifactId>
<version>1.4.0-SNAPSHOT</version>
</parent>
<artifactId>nifi-confluent-platform-nar</artifactId>
<packaging>nar</packaging>
<dependencies>
<dependency>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-standard-services-api-nar</artifactId>
<type>nar</type>
</dependency>
<dependency>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-confluent-schema-registry-service</artifactId>
</dependency>
</dependencies>
</project>

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nifi-nar-bundles/nifi-confluent-platform-bundle/nifi-confluent-platform-nar/src/main/resource/META-INF/LICENSE Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<!-- Copyright 2016 Hortoworks, Inc. All rights reserved. Hortonworks, Inc.
licenses this file to you under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License. You may
obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed
under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES
OR CONDITIONS OF ANY KIND, either express or implied. See the License for
the specific language governing permissions and limitations under the License.
See the associated NOTICE file for additional information regarding copyright
ownership. -->
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-confluent-platform-bundle</artifactId>
<version>1.4.0-SNAPSHOT</version>
</parent>
<artifactId>nifi-confluent-schema-registry-service</artifactId>
<packaging>jar</packaging>
<dependencies>
<dependency>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-schema-registry-service-api</artifactId>
</dependency>
<dependency>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-record</artifactId>
</dependency>
<dependency>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-avro-record-utils</artifactId>
</dependency>
<dependency>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-api</artifactId>
</dependency>
<dependency>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-ssl-context-service-api</artifactId>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-client</artifactId>
</dependency>
<dependency>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-web-utils</artifactId>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<repositories>
<repository>
<id>confluent</id>
<url>http://packages.confluent.io/maven/</url>
</repository>
</repositories>
</project>

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nifi-nar-bundles/nifi-confluent-platform-bundle/nifi-confluent-schema-registry-service/src/main/java/org/apache/nifi/confluent/schemaregistry/ConfluentSchemaRegistry.java Normal file
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.nifi.confluent.schemaregistry;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.EnumSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import javax.net.ssl.SSLContext;
import org.apache.nifi.annotation.documentation.CapabilityDescription;
import org.apache.nifi.annotation.documentation.Tags;
import org.apache.nifi.annotation.lifecycle.OnEnabled;
import org.apache.nifi.components.PropertyDescriptor;
import org.apache.nifi.components.ValidationContext;
import org.apache.nifi.components.ValidationResult;
import org.apache.nifi.confluent.schemaregistry.client.CachingSchemaRegistryClient;
import org.apache.nifi.confluent.schemaregistry.client.RestSchemaRegistryClient;
import org.apache.nifi.confluent.schemaregistry.client.SchemaRegistryClient;
import org.apache.nifi.context.PropertyContext;
import org.apache.nifi.controller.AbstractControllerService;
import org.apache.nifi.controller.ConfigurationContext;
import org.apache.nifi.processor.util.StandardValidators;
import org.apache.nifi.schema.access.SchemaField;
import org.apache.nifi.schema.access.SchemaNotFoundException;
import org.apache.nifi.schemaregistry.services.SchemaRegistry;
import org.apache.nifi.serialization.record.RecordSchema;
import org.apache.nifi.ssl.SSLContextService;
import org.apache.nifi.ssl.SSLContextService.ClientAuth;
@Tags({"schema", "registry", "confluent", "avro", "kafka"})
@CapabilityDescription("Provides a Schema Registry that interacts with the Confluent Schema Registry so that those Schemas that are stored in the Confluent Schema "
+ "Registry can be used in NiFi. The Confluent Schema Registry has a notion of a \"subject\" for schemas, which is their terminology for a schema name. When a Schema "
+ "is looked up by name by this registry, it will find a Schema in the Confluent Schema Registry with that subject.")
public class ConfluentSchemaRegistry extends AbstractControllerService implements SchemaRegistry {
private static final Set<SchemaField> schemaFields = EnumSet.of(SchemaField.SCHEMA_NAME, SchemaField.SCHEMA_TEXT,
SchemaField.SCHEMA_TEXT_FORMAT, SchemaField.SCHEMA_IDENTIFIER, SchemaField.SCHEMA_VERSION);
static final PropertyDescriptor SCHEMA_REGISTRY_URLS = new PropertyDescriptor.Builder()
.name("url")
.displayName("Schema Registry URLs")
.description("A comma-separated list of URLs of the Schema Registry to interact with")
.expressionLanguageSupported(true)
.defaultValue("http://localhost:8081")
.required(true)
.addValidator(new MultipleURLValidator())
.build();
static final PropertyDescriptor SSL_CONTEXT = new PropertyDescriptor.Builder()
.name("ssl-context")
.displayName("SSL Context Service")
.description("Specifies the SSL Context Service to use for interacting with the Confluent Schema Registry")
.identifiesControllerService(SSLContextService.class)
.required(false)
.build();
static final PropertyDescriptor CACHE_SIZE = new PropertyDescriptor.Builder()
.name("cache-size")
.displayName("Cache Size")
.description("Specifies how many Schemas should be cached from the Schema Registry")
.addValidator(StandardValidators.NON_NEGATIVE_INTEGER_VALIDATOR)
.defaultValue("1000")
.required(true)
.build();
static final PropertyDescriptor CACHE_EXPIRATION = new PropertyDescriptor.Builder()
.name("cache-expiration")
.displayName("Cache Expiration")
.description("Specifies how long a Schema that is cached should remain in the cache. Once this time period elapses, a "
+ "cached version of a schema will no longer be used, and the service will have to communicate with the "
+ "Schema Registry again in order to obtain the schema.")
.addValidator(StandardValidators.TIME_PERIOD_VALIDATOR)
.defaultValue("1 hour")
.required(true)
.build();
static final PropertyDescriptor TIMEOUT = new PropertyDescriptor.Builder()
.name("timeout")
.displayName("Communications Timeout")
.description("Specifies how long to wait to receive data from the Schema Registry before considering the communications a failure")
.addValidator(StandardValidators.TIME_PERIOD_VALIDATOR)
.expressionLanguageSupported(false)
.defaultValue("30 secs")
.required(true)
.build();
private volatile SchemaRegistryClient client;
@Override
protected List<PropertyDescriptor> getSupportedPropertyDescriptors() {
final List<PropertyDescriptor> properties = new ArrayList<>();
properties.add(SCHEMA_REGISTRY_URLS);
properties.add(SSL_CONTEXT);
properties.add(TIMEOUT);
properties.add(CACHE_SIZE);
properties.add(CACHE_EXPIRATION);
return properties;
}
@OnEnabled
public void onEnabled(final ConfigurationContext context) {
final List<String> baseUrls = getBaseURLs(context);
final int timeoutMillis = context.getProperty(TIMEOUT).asTimePeriod(TimeUnit.MILLISECONDS).intValue();
final SSLContext sslContext;
final SSLContextService sslContextService = context.getProperty(SSL_CONTEXT).asControllerService(SSLContextService.class);
if (sslContextService == null) {
sslContext = null;
} else {
sslContext = sslContextService.createSSLContext(ClientAuth.REQUIRED);
}
final SchemaRegistryClient restClient = new RestSchemaRegistryClient(baseUrls, timeoutMillis, sslContext);
final int cacheSize = context.getProperty(CACHE_SIZE).asInteger();
final long cacheExpiration = context.getProperty(CACHE_EXPIRATION).asTimePeriod(TimeUnit.NANOSECONDS).longValue();
client = new CachingSchemaRegistryClient(restClient, cacheSize, cacheExpiration);
}
@Override
protected Collection<ValidationResult> customValidate(final ValidationContext validationContext) {
final boolean sslContextSet = validationContext.getProperty(SSL_CONTEXT).isSet();
if (sslContextSet) {
final List<String> baseUrls = getBaseURLs(validationContext);
final List<String> insecure = baseUrls.stream()
.filter(url -> !url.startsWith("https"))
.collect(Collectors.toList());
if (!insecure.isEmpty()) {
return Collections.singleton(new ValidationResult.Builder()
.subject(SCHEMA_REGISTRY_URLS.getDisplayName())
.input(insecure.get(0))
.valid(false)
.explanation("When SSL Context is configured, all Schema Registry URL's must use HTTPS, not HTTP")
.build());
}
}
return Collections.emptyList();
}
private List<String> getBaseURLs(final PropertyContext context) {
final String urls = context.getProperty(SCHEMA_REGISTRY_URLS).evaluateAttributeExpressions().getValue();
final List<String> baseUrls = Stream.of(urls.split(","))
.map(url -> url.trim())
.collect(Collectors.toList());
return baseUrls;
}
@Override
public String retrieveSchemaText(final String schemaName) throws IOException, SchemaNotFoundException {
final RecordSchema schema = retrieveSchema(schemaName);
return schema.getSchemaText().get();
}
@Override
public String retrieveSchemaText(final long schemaId, final int version) throws IOException, SchemaNotFoundException {
final RecordSchema schema = retrieveSchema(schemaId, version);
return schema.getSchemaText().get();
}
@Override
public RecordSchema retrieveSchema(final String schemaName) throws IOException, SchemaNotFoundException {
final RecordSchema schema = client.getSchema(schemaName);
return schema;
}
@Override
public RecordSchema retrieveSchema(final long schemaId, final int version) throws IOException, SchemaNotFoundException {
final RecordSchema schema = client.getSchema((int) schemaId);
return schema;
}
@Override
public Set<SchemaField> getSuppliedSchemaFields() {
return schemaFields;
}
}

51
nifi-nar-bundles/nifi-confluent-platform-bundle/nifi-confluent-schema-registry-service/src/main/java/org/apache/nifi/confluent/schemaregistry/MultipleURLValidator.java Normal file
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@ -0,0 +1,51 @@
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.nifi.confluent.schemaregistry;
import org.apache.nifi.components.ValidationContext;
import org.apache.nifi.components.ValidationResult;
import org.apache.nifi.components.Validator;
import org.apache.nifi.processor.util.StandardValidators;
public class MultipleURLValidator implements Validator {
@Override
public ValidationResult validate(final String subject, final String input, final ValidationContext context) {
final String[] splits = input.split(",");
if (splits.length == 0) {
return new ValidationResult.Builder()
.subject(subject)
.input(input)
.valid(false)
.explanation("At least one URL must be specified")
.build();
}
for (final String split : splits) {
final String url = split.trim();
final ValidationResult result = StandardValidators.URL_VALIDATOR.validate(subject, url, context);
if (result != null && !result.isValid()) {
return result;
}
}
return new ValidationResult.Builder().subject(subject).input(input).valid(true).build();
}
}

129
nifi-nar-bundles/nifi-confluent-platform-bundle/nifi-confluent-schema-registry-service/src/main/java/org/apache/nifi/confluent/schemaregistry/client/CachingSchemaRegistryClient.java Normal file
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@ -0,0 +1,129 @@
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.nifi.confluent.schemaregistry.client;
import java.io.IOException;
import java.util.LinkedHashMap;
import java.util.Map;
import org.apache.nifi.schema.access.SchemaNotFoundException;
import org.apache.nifi.serialization.record.RecordSchema;
public class CachingSchemaRegistryClient implements SchemaRegistryClient {
private final SchemaRegistryClient client;
private final long expirationNanos;
private final Map<String, CachedRecordSchema> nameCache;
private final Map<Integer, CachedRecordSchema> idCache;
public CachingSchemaRegistryClient(final SchemaRegistryClient toWrap, final int cacheSize, final long expirationNanos) {
this.client = toWrap;
this.expirationNanos = expirationNanos;
nameCache = new Cache<>(cacheSize);
idCache = new Cache<>(cacheSize);
}
@Override
public RecordSchema getSchema(final String schemaName) throws IOException, SchemaNotFoundException {
RecordSchema schema = getFromCache(nameCache, schemaName);
if (schema != null) {
return schema;
}
schema = client.getSchema(schemaName);
synchronized (nameCache) {
nameCache.put(schemaName, new CachedRecordSchema(schema));
}
return schema;
}
@Override
public RecordSchema getSchema(final int schemaId) throws IOException, SchemaNotFoundException {
RecordSchema schema = getFromCache(idCache, schemaId);
if (schema != null) {
return schema;
}
schema = client.getSchema(schemaId);
synchronized (idCache) {
idCache.put(schemaId, new CachedRecordSchema(schema));
}
return schema;
}
private RecordSchema getFromCache(final Map<?, CachedRecordSchema> cache, final Object key) {
final CachedRecordSchema cachedSchema;
synchronized (cache) {
cachedSchema = cache.get(key);
}
if (cachedSchema == null) {
return null;
}
if (cachedSchema.isOlderThan(System.nanoTime() - expirationNanos)) {
return null;
}
return cachedSchema.getSchema();
}
private static class Cache<K, V> extends LinkedHashMap<K, V> {
private final int cacheSize;
public Cache(final int cacheSize) {
this.cacheSize = cacheSize;
}
@Override
protected boolean removeEldestEntry(final Map.Entry<K, V> eldest) {
return size() >= cacheSize;
}
}
private static class CachedRecordSchema {
private final RecordSchema schema;
private final long cachedTimestamp;
public CachedRecordSchema(final RecordSchema schema) {
this(schema, System.nanoTime());
}
public CachedRecordSchema(final RecordSchema schema, final long timestamp) {
this.schema = schema;
this.cachedTimestamp = timestamp;
}
public RecordSchema getSchema() {
return schema;
}
public boolean isOlderThan(final long timestamp) {
return cachedTimestamp < timestamp;
}
}
}

181
nifi-nar-bundles/nifi-confluent-platform-bundle/nifi-confluent-schema-registry-service/src/main/java/org/apache/nifi/confluent/schemaregistry/client/RestSchemaRegistryClient.java Normal file
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@ -0,0 +1,181 @@
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.nifi.confluent.schemaregistry.client;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import javax.net.ssl.SSLContext;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import org.apache.avro.Schema;
import org.apache.avro.SchemaParseException;
import org.apache.nifi.avro.AvroTypeUtil;
import org.apache.nifi.schema.access.SchemaNotFoundException;
import org.apache.nifi.serialization.record.RecordSchema;
import org.apache.nifi.serialization.record.SchemaIdentifier;
import org.apache.nifi.web.util.WebUtils;
import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.node.ArrayNode;
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.api.client.config.ClientConfig;
import com.sun.jersey.api.client.config.DefaultClientConfig;
/**
* <p>
* A Client for interacting with Confluent Schema Registry. We make use of Jersey Client to interact with the
* Confluent Schema Registry REST API because the provided schema registry client does not provide a way to
* use HTTPS for interacting with the schema registry (it assumes that system properties will be used, instead of
* an SSLContext) and also does not allow configuration of (or use) timeouts. As a result, if the Schema Registry
* crashed or was shut down, NiFi threads could be stuck indefinitely until NiFi is restarted. To avoid this,
* we make use of Jersey Client and set timeouts appropriately.
* </p>
*/
public class RestSchemaRegistryClient implements SchemaRegistryClient {
private final List<String> baseUrls;
private final Client client;
private static final String SUBJECT_FIELD_NAME = "subject";
private static final String VERSION_FIELD_NAME = "version";
private static final String ID_FIELD_NAME = "id";
private static final String SCHEMA_TEXT_FIELD_NAME = "schema";
private final ConcurrentMap<String, Integer> schemaNameToIdentifierMap = new ConcurrentHashMap<>();
private final ConcurrentMap<Integer, String> schemaIdentifierToNameMap = new ConcurrentHashMap<>();
public RestSchemaRegistryClient(final List<String> baseUrls, final int timeoutMillis, final SSLContext sslContext) {
this.baseUrls = new ArrayList<>(baseUrls);
final ClientConfig clientConfig = new DefaultClientConfig();
clientConfig.getProperties().put(ClientConfig.PROPERTY_CONNECT_TIMEOUT, timeoutMillis);
clientConfig.getProperties().put(ClientConfig.PROPERTY_READ_TIMEOUT, timeoutMillis);
client = WebUtils.createClient(clientConfig, sslContext);
}
@Override
public RecordSchema getSchema(final String schemaName) throws IOException, SchemaNotFoundException {
final String pathSuffix = getSubjectPath(schemaName);
final JsonNode responseJson = fetchJsonResponse(pathSuffix, "name " + schemaName);
final RecordSchema recordSchema = createRecordSchema(responseJson);
return recordSchema;
}
@Override
public RecordSchema getSchema(final int schemaId) throws IOException, SchemaNotFoundException {
// The Confluent Schema Registry's REST API does not provide us with the 'subject' (name) of a Schema given the ID.
// It will provide us only the text of the Schema itself. Therefore, in order to determine the name (which is required for
// a SchemaIdentifier), we must obtain a list of all Schema names, and then request each and every one of the schemas to determine
// if the ID requested matches the Schema's ID.
// To make this more efficient, we will cache a mapping of Schema Name to identifier, so that we can look this up more efficiently.
// Check if we have cached the Identifier to Name mapping
final String schemaName = schemaIdentifierToNameMap.get(schemaId);
if (schemaName != null) {
return getSchema(schemaName);
}
final String schemaDescription = "identifier " + schemaId;
final JsonNode schemaNameArray = fetchJsonResponse("/subjects", schemaDescription);
if (!schemaNameArray.isArray()) {
throw new IOException("When determining Subjects that are available, expected a JSON Array but did not receive a valid response");
}
final ArrayNode arrayNode = (ArrayNode) schemaNameArray;
for (final JsonNode node : arrayNode) {
final String nodeName = node.getTextValue();
final String schemaPath = getSubjectPath(nodeName);
final JsonNode schemaNode = fetchJsonResponse(schemaPath, schemaDescription);
final int id = schemaNode.get(ID_FIELD_NAME).asInt();
schemaNameToIdentifierMap.put(nodeName, id);
schemaIdentifierToNameMap.put(id, nodeName);
if (id == schemaId) {
return createRecordSchema(schemaNode);
}
}
throw new SchemaNotFoundException("Could not find a schema with identifier " + schemaId);
}
private RecordSchema createRecordSchema(final JsonNode schemaNode) throws SchemaNotFoundException {
final String subject = schemaNode.get(SUBJECT_FIELD_NAME).getTextValue();
final int version = schemaNode.get(VERSION_FIELD_NAME).asInt();
final int id = schemaNode.get(ID_FIELD_NAME).asInt();
final String schemaText = schemaNode.get(SCHEMA_TEXT_FIELD_NAME).getTextValue();
try {
final Schema avroSchema = new Schema.Parser().parse(schemaText);
final SchemaIdentifier schemaId = SchemaIdentifier.of(subject, id, version);
final RecordSchema recordSchema = AvroTypeUtil.createSchema(avroSchema, schemaText, schemaId);
return recordSchema;
} catch (final SchemaParseException spe) {
throw new SchemaNotFoundException("Obtained Schema with id " + id + " and name " + subject
+ " from Confluent Schema Registry but the Schema Text that was returned is not a valid Avro Schema");
}
}
private String getSubjectPath(final String schemaName) throws UnsupportedEncodingException {
return "/subjects/" + URLEncoder.encode(schemaName, "UTF-8") + "/versions/latest";
}
private JsonNode fetchJsonResponse(final String pathSuffix, final String schemaDescription) throws SchemaNotFoundException, IOException {
String errorMessage = null;
for (final String baseUrl : baseUrls) {
final String path = pathSuffix.startsWith("/") ? pathSuffix : "/" + pathSuffix;
final String trimmedBase = baseUrl.endsWith("/") ? baseUrl.substring(0, baseUrl.length() - 1) : baseUrl;
final String url = trimmedBase + path;
final WebResource.Builder builder = client.resource(url).accept(MediaType.APPLICATION_JSON);
final ClientResponse response = builder.get(ClientResponse.class);
final int responseCode = response.getStatus();
if (responseCode == Response.Status.OK.getStatusCode()) {
final JsonNode responseJson = response.getEntity(JsonNode.class);
return responseJson;
}
if (responseCode == Response.Status.NOT_FOUND.getStatusCode()) {
throw new SchemaNotFoundException("Could not find Schema with " + schemaDescription + " from the Confluent Schema Registry located at " + baseUrl);
}
if (errorMessage == null) {
errorMessage = response.getEntity(String.class);
}
}
throw new IOException("Failed to retrieve Schema with " + schemaDescription + " from any of the Confluent Schema Registry URL's provided; failure response message: " + errorMessage);
}
}

30
nifi-nar-bundles/nifi-confluent-platform-bundle/nifi-confluent-schema-registry-service/src/main/java/org/apache/nifi/confluent/schemaregistry/client/SchemaRegistryClient.java Normal file
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@ -0,0 +1,30 @@
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.nifi.confluent.schemaregistry.client;
import java.io.IOException;
import org.apache.nifi.schema.access.SchemaNotFoundException;
import org.apache.nifi.serialization.record.RecordSchema;
public interface SchemaRegistryClient {
RecordSchema getSchema(String schemaName) throws IOException, SchemaNotFoundException;
RecordSchema getSchema(int schemaId) throws IOException, SchemaNotFoundException;
}

16
nifi-nar-bundles/nifi-confluent-platform-bundle/nifi-confluent-schema-registry-service/src/main/resources/META-INF/services/org.apache.nifi.controller.ControllerService Normal file
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@ -0,0 +1,16 @@
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
org.apache.nifi.confluent.schemaregistry.ConfluentSchemaRegistry

27
nifi-nar-bundles/nifi-confluent-platform-bundle/pom.xml Normal file
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@ -0,0 +1,27 @@
<?xml version="1.0" encoding="UTF-8"?>
<!-- Licensed to the Apache Software Foundation (ASF) under one or more contributor
license agreements. See the NOTICE file distributed with this work for additional
information regarding copyright ownership. The ASF licenses this file to
You under the Apache License, Version 2.0 (the "License"); you may not use
this file except in compliance with the License. You may obtain a copy of
the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required
by applicable law or agreed to in writing, software distributed under the
License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
OF ANY KIND, either express or implied. See the License for the specific
language governing permissions and limitations under the License. -->
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-nar-bundles</artifactId>
<version>1.4.0-SNAPSHOT</version>
</parent>
<artifactId>nifi-confluent-platform-bundle</artifactId>
<packaging>pom</packaging>
<description>A bundle of components that interact with the Confluent Platform</description>
<modules>
<module>nifi-confluent-schema-registry-service</module>
<module>nifi-confluent-platform-nar</module>
</modules>
</project>

61
nifi-nar-bundles/nifi-extension-utils/nifi-record-utils/nifi-avro-record-utils/src/main/java/org/apache/nifi/schema/access/SchemaAccessUtils.java
View File

@ -16,20 +16,19 @@
*/ */
package org.apache.nifi.schema.access; package org.apache.nifi.schema.access;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import org.apache.nifi.avro.AvroSchemaValidator; import org.apache.nifi.avro.AvroSchemaValidator;
import org.apache.nifi.components.AllowableValue; import org.apache.nifi.components.AllowableValue;
import org.apache.nifi.components.PropertyDescriptor; import org.apache.nifi.components.PropertyDescriptor;
import org.apache.nifi.components.ValidationContext; import org.apache.nifi.components.ValidationContext;
import org.apache.nifi.components.ValidationResult; import org.apache.nifi.components.ValidationResult;
import org.apache.nifi.controller.ConfigurationContext; import org.apache.nifi.context.PropertyContext;
import org.apache.nifi.processor.ProcessContext;
import org.apache.nifi.processor.util.StandardValidators; import org.apache.nifi.processor.util.StandardValidators;
import org.apache.nifi.schemaregistry.services.SchemaRegistry; import org.apache.nifi.schemaregistry.services.SchemaRegistry;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
public class SchemaAccessUtils { public class SchemaAccessUtils {
public static final AllowableValue SCHEMA_NAME_PROPERTY = new AllowableValue("schema-name", "Use 'Schema Name' Property", public static final AllowableValue SCHEMA_NAME_PROPERTY = new AllowableValue("schema-name", "Use 'Schema Name' Property",
@ -45,10 +44,13 @@ public class SchemaAccessUtils {
"The FlowFile contains 3 Attributes that will be used to lookup a Schema from the configured Schema Registry: 'schema.identifier', 'schema.version', and 'schema.protocol.version'"); "The FlowFile contains 3 Attributes that will be used to lookup a Schema from the configured Schema Registry: 'schema.identifier', 'schema.version', and 'schema.protocol.version'");
public static final AllowableValue INHERIT_RECORD_SCHEMA = new AllowableValue("inherit-record-schema", "Inherit Record Schema", public static final AllowableValue INHERIT_RECORD_SCHEMA = new AllowableValue("inherit-record-schema", "Inherit Record Schema",
"The schema used to write records will be the same schema that was given to the Record when the Record was created."); "The schema used to write records will be the same schema that was given to the Record when the Record was created.");
public static final AllowableValue CONFLUENT_ENCODED_SCHEMA = new AllowableValue("confluent-encoded", "Confluent Content-Encoded Schema Reference",
"The content of the FlowFile contains a reference to a schema in the Schema Registry service. The reference is encoded as a single "
+ "'Magic Byte' followed by 4 bytes representing the identifier of the schema, as outlined at http://docs.confluent.io/current/schema-registry/docs/serializer-formatter.html. "
+ "This is based on version 3.2.x of the Confluent Schema Registry.");
public static final PropertyDescriptor SCHEMA_REGISTRY = new PropertyDescriptor.Builder()
public static final PropertyDescriptor SCHEMA_REGISTRY = new PropertyDescriptor.Builder()
.name("schema-registry") .name("schema-registry")
.displayName("Schema Registry") .displayName("Schema Registry")
.description("Specifies the Controller Service to use for the Schema Registry") .description("Specifies the Controller Service to use for the Schema Registry")
@ -56,11 +58,11 @@ public class SchemaAccessUtils {
.required(false) .required(false)
.build(); .build();
public static final PropertyDescriptor SCHEMA_ACCESS_STRATEGY = new PropertyDescriptor.Builder() public static final PropertyDescriptor SCHEMA_ACCESS_STRATEGY = new PropertyDescriptor.Builder()
.name("schema-access-strategy") .name("schema-access-strategy")
.displayName("Schema Access Strategy") .displayName("Schema Access Strategy")
.description("Specifies how to obtain the schema that is to be used for interpreting the data.") .description("Specifies how to obtain the schema that is to be used for interpreting the data.")
.allowableValues(SCHEMA_NAME_PROPERTY, SCHEMA_TEXT_PROPERTY, HWX_SCHEMA_REF_ATTRIBUTES, HWX_CONTENT_ENCODED_SCHEMA) .allowableValues(SCHEMA_NAME_PROPERTY, SCHEMA_TEXT_PROPERTY, HWX_SCHEMA_REF_ATTRIBUTES, HWX_CONTENT_ENCODED_SCHEMA, CONFLUENT_ENCODED_SCHEMA)
.defaultValue(SCHEMA_NAME_PROPERTY.getValue()) .defaultValue(SCHEMA_NAME_PROPERTY.getValue())
.required(true) .required(true)
.build(); .build();
@ -115,42 +117,11 @@ public class SchemaAccessUtils {
private static boolean isSchemaRegistryRequired(final String schemaAccessValue) { private static boolean isSchemaRegistryRequired(final String schemaAccessValue) {
return HWX_CONTENT_ENCODED_SCHEMA.getValue().equalsIgnoreCase(schemaAccessValue) || SCHEMA_NAME_PROPERTY.getValue().equalsIgnoreCase(schemaAccessValue) return HWX_CONTENT_ENCODED_SCHEMA.getValue().equalsIgnoreCase(schemaAccessValue) || SCHEMA_NAME_PROPERTY.getValue().equalsIgnoreCase(schemaAccessValue)
|| HWX_SCHEMA_REF_ATTRIBUTES.getValue().equalsIgnoreCase(schemaAccessValue); || HWX_SCHEMA_REF_ATTRIBUTES.getValue().equalsIgnoreCase(schemaAccessValue) || CONFLUENT_ENCODED_SCHEMA.getValue().equalsIgnoreCase(schemaAccessValue);
} }
public static SchemaAccessStrategy getSchemaAccessStrategy(final String allowableValue, final SchemaRegistry schemaRegistry, final ProcessContext context) {
if (allowableValue.equalsIgnoreCase(SCHEMA_NAME_PROPERTY.getValue())) { public static SchemaAccessStrategy getSchemaAccessStrategy(final String allowableValue, final SchemaRegistry schemaRegistry, final PropertyContext context) {
return new SchemaNamePropertyStrategy(schemaRegistry, context.getProperty(SCHEMA_NAME));
} else if (allowableValue.equalsIgnoreCase(INHERIT_RECORD_SCHEMA.getValue())) {
return new InheritSchemaFromRecord();
} else if (allowableValue.equalsIgnoreCase(SCHEMA_TEXT_PROPERTY.getValue())) {
return new AvroSchemaTextStrategy(context.getProperty(SCHEMA_TEXT));
} else if (allowableValue.equalsIgnoreCase(HWX_CONTENT_ENCODED_SCHEMA.getValue())) {
return new HortonworksEncodedSchemaReferenceStrategy(schemaRegistry);
} else if (allowableValue.equalsIgnoreCase(HWX_SCHEMA_REF_ATTRIBUTES.getValue())) {
return new HortonworksAttributeSchemaReferenceStrategy(schemaRegistry);
}
return null;
}
public static SchemaAccessStrategy getSchemaAccessStrategy(final String allowableValue, final SchemaRegistry schemaRegistry, final ConfigurationContext context) {
if (allowableValue.equalsIgnoreCase(SCHEMA_NAME_PROPERTY.getValue())) {
return new SchemaNamePropertyStrategy(schemaRegistry, context.getProperty(SCHEMA_NAME));
} else if (allowableValue.equalsIgnoreCase(INHERIT_RECORD_SCHEMA.getValue())) {
return new InheritSchemaFromRecord();
} else if (allowableValue.equalsIgnoreCase(SCHEMA_TEXT_PROPERTY.getValue())) {
return new AvroSchemaTextStrategy(context.getProperty(SCHEMA_TEXT));
} else if (allowableValue.equalsIgnoreCase(HWX_CONTENT_ENCODED_SCHEMA.getValue())) {
return new HortonworksEncodedSchemaReferenceStrategy(schemaRegistry);
} else if (allowableValue.equalsIgnoreCase(HWX_SCHEMA_REF_ATTRIBUTES.getValue())) {
return new HortonworksAttributeSchemaReferenceStrategy(schemaRegistry);
}
return null;
}
public static SchemaAccessStrategy getSchemaAccessStrategy(final String allowableValue, final SchemaRegistry schemaRegistry, final ValidationContext context) {
if (allowableValue.equalsIgnoreCase(SCHEMA_NAME_PROPERTY.getValue())) { if (allowableValue.equalsIgnoreCase(SCHEMA_NAME_PROPERTY.getValue())) {
return new SchemaNamePropertyStrategy(schemaRegistry, context.getProperty(SCHEMA_NAME)); return new SchemaNamePropertyStrategy(schemaRegistry, context.getProperty(SCHEMA_NAME));
} else if (allowableValue.equalsIgnoreCase(INHERIT_RECORD_SCHEMA.getValue())) { } else if (allowableValue.equalsIgnoreCase(INHERIT_RECORD_SCHEMA.getValue())) {
@ -161,6 +132,8 @@ public class SchemaAccessUtils {
return new HortonworksEncodedSchemaReferenceStrategy(schemaRegistry); return new HortonworksEncodedSchemaReferenceStrategy(schemaRegistry);
} else if (allowableValue.equalsIgnoreCase(HWX_SCHEMA_REF_ATTRIBUTES.getValue())) { } else if (allowableValue.equalsIgnoreCase(HWX_SCHEMA_REF_ATTRIBUTES.getValue())) {
return new HortonworksAttributeSchemaReferenceStrategy(schemaRegistry); return new HortonworksAttributeSchemaReferenceStrategy(schemaRegistry);
} else if (allowableValue.equalsIgnoreCase(CONFLUENT_ENCODED_SCHEMA.getValue())) {
return new ConfluentSchemaRegistryStrategy(schemaRegistry);
} }
return null; return null;

74
nifi-nar-bundles/nifi-extension-utils/nifi-record-utils/nifi-standard-record-utils/src/main/java/org/apache/nifi/schema/access/ConfluentSchemaRegistryStrategy.java Normal file
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@ -0,0 +1,74 @@
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.nifi.schema.access;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import org.apache.nifi.flowfile.FlowFile;
import org.apache.nifi.schemaregistry.services.SchemaRegistry;
import org.apache.nifi.serialization.record.RecordSchema;
import org.apache.nifi.stream.io.StreamUtils;
public class ConfluentSchemaRegistryStrategy implements SchemaAccessStrategy {
private final Set<SchemaField> schemaFields;
private final SchemaRegistry schemaRegistry;
public ConfluentSchemaRegistryStrategy(final SchemaRegistry schemaRegistry) {
this.schemaRegistry = schemaRegistry;
schemaFields = new HashSet<>();
schemaFields.add(SchemaField.SCHEMA_IDENTIFIER);
schemaFields.add(SchemaField.SCHEMA_VERSION);
schemaFields.addAll(schemaRegistry == null ? Collections.emptySet() : schemaRegistry.getSuppliedSchemaFields());
}
@Override
public RecordSchema getSchema(final FlowFile flowFile, final InputStream contentStream, final RecordSchema readSchema) throws SchemaNotFoundException, IOException {
final byte[] buffer = new byte[5];
try {
StreamUtils.fillBuffer(contentStream, buffer);
} catch (final IOException ioe) {
throw new SchemaNotFoundException("Could not read first 5 bytes from stream", ioe);
}
// This encoding follows the pattern that is provided for serializing data by the Confluent Schema Registry serializer
// as it is provided at:
// http://docs.confluent.io/current/schema-registry/docs/serializer-formatter.html#wire-format
// The format consists of the first byte always being 0, to indicate a 'magic byte' followed by 4 bytes
// representing the schema id.
final ByteBuffer bb = ByteBuffer.wrap(buffer);
final int magicByte = bb.get();
if (magicByte != 0) {
throw new SchemaNotFoundException("Schema Encoding appears to be of an incompatible version. "
+ "Expected stream to begin with a Magic Byte of 0 but first byte was " + magicByte);
}
final int schemaId = bb.getInt();
return schemaRegistry.retrieveSchema(schemaId, 1);
}
@Override
public Set<SchemaField> getSuppliedSchemaFields() {
return schemaFields;
}
}

77
nifi-nar-bundles/nifi-extension-utils/nifi-record-utils/nifi-standard-record-utils/src/main/java/org/apache/nifi/schema/access/ConfluentSchemaRegistryWriter.java Normal file
View File

@ -0,0 +1,77 @@
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.nifi.schema.access;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.util.Collections;
import java.util.EnumSet;
import java.util.Map;
import java.util.OptionalInt;
import java.util.OptionalLong;
import java.util.Set;
import org.apache.nifi.serialization.record.RecordSchema;
import org.apache.nifi.serialization.record.SchemaIdentifier;
public class ConfluentSchemaRegistryWriter implements SchemaAccessWriter {
private static final Set<SchemaField> requiredSchemaFields = EnumSet.of(SchemaField.SCHEMA_IDENTIFIER, SchemaField.SCHEMA_VERSION);
@Override
public void writeHeader(final RecordSchema schema, final OutputStream out) throws IOException {
final SchemaIdentifier identifier = schema.getIdentifier();
final long id = identifier.getIdentifier().getAsLong();
// This encoding follows the pattern that is provided for serializing data by the Confluent Schema Registry serializer
// as it is provided at:
// http://docs.confluent.io/current/schema-registry/docs/serializer-formatter.html#wire-format
// The format consists of the first byte always being 0, to indicate a 'magic byte' followed by 4 bytes
// representing the schema id.
final ByteBuffer bb = ByteBuffer.allocate(5);
bb.put((byte) 0);
bb.putInt((int) id);
out.write(bb.array());
}
@Override
public Map<String, String> getAttributes(final RecordSchema schema) {
return Collections.emptyMap();
}
@Override
public void validateSchema(RecordSchema schema) throws SchemaNotFoundException {
final SchemaIdentifier identifier = schema.getIdentifier();
final OptionalLong identifierOption = identifier.getIdentifier();
if (!identifierOption.isPresent()) {
throw new SchemaNotFoundException("Cannot write Confluent Schema Registry Reference because the Schema Identifier is not known");
}
final OptionalInt versionOption = identifier.getVersion();
if (!versionOption.isPresent()) {
throw new SchemaNotFoundException("Cannot write Confluent Schema Registry Reference because the Schema Version is not known");
}
}
@Override
public Set<SchemaField> getRequiredSchemaFields() {
return requiredSchemaFields;
}
}

9
nifi-nar-bundles/nifi-registry-bundle/pom.xml
View File

@ -24,13 +24,4 @@
<module>nifi-registry-service</module> <module>nifi-registry-service</module>
<module>nifi-registry-nar</module> <module>nifi-registry-nar</module>
</modules> </modules>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-registry-processors</artifactId>
<version>1.2.0-SNAPSHOT</version>
</dependency>
</dependencies>
</dependencyManagement>
</project> </project>

6
nifi-nar-bundles/nifi-standard-services/nifi-hwx-schema-registry-bundle/nifi-hwx-schema-registry-service/src/main/java/org/apache/nifi/schemaregistry/hortonworks/HortonworksSchemaRegistry.java
View File

@ -60,12 +60,6 @@ public class HortonworksSchemaRegistry extends AbstractControllerService impleme
private final ConcurrentMap<String, Tuple<SchemaVersionInfo, Long>> schemaVersionByNameCache = new ConcurrentHashMap<>(); private final ConcurrentMap<String, Tuple<SchemaVersionInfo, Long>> schemaVersionByNameCache = new ConcurrentHashMap<>();
private final ConcurrentMap<SchemaVersionKey, Tuple<SchemaVersionInfo, Long>> schemaVersionByKeyCache = new ConcurrentHashMap<>(); private final ConcurrentMap<SchemaVersionKey, Tuple<SchemaVersionInfo, Long>> schemaVersionByKeyCache = new ConcurrentHashMap<>();
private static final String LOGICAL_TYPE_DATE = "date";
private static final String LOGICAL_TYPE_TIME_MILLIS = "time-millis";
private static final String LOGICAL_TYPE_TIME_MICROS = "time-micros";
private static final String LOGICAL_TYPE_TIMESTAMP_MILLIS = "timestamp-millis";
private static final String LOGICAL_TYPE_TIMESTAMP_MICROS = "timestamp-micros";
private volatile long versionInfoCacheNanos; private volatile long versionInfoCacheNanos;
static final PropertyDescriptor URL = new PropertyDescriptor.Builder() static final PropertyDescriptor URL = new PropertyDescriptor.Builder()

7
nifi-nar-bundles/nifi-standard-services/nifi-record-serialization-services-bundle/nifi-record-serialization-services/src/main/java/org/apache/nifi/csv/CSVUtils.java
View File

@ -63,10 +63,11 @@ public class CSVUtils {
.build(); .build();
static final PropertyDescriptor SKIP_HEADER_LINE = new PropertyDescriptor.Builder() static final PropertyDescriptor SKIP_HEADER_LINE = new PropertyDescriptor.Builder()
.name("Skip Header Line") .name("Skip Header Line")
.description("Specifies whether or not the first line of CSV should be considered a Header and skipped. If the Schema Access Strategy " .displayName("Treat First Line as Header")
.description("Specifies whether or not the first line of CSV should be considered a Header or should be considered a record. If the Schema Access Strategy "
+ "indicates that the columns must be defined in the header, then this property will be ignored, since the header must always be " + "indicates that the columns must be defined in the header, then this property will be ignored, since the header must always be "
+ "present and won't be processed as a Record. Otherwise, this property should be 'true' if the first non-comment line of CSV " + "present and won't be processed as a Record. Otherwise, if 'true', then the first line of CSV data will not be processed as a record and if 'false',"
+ "contains header information that needs to be ignored.") + "then the first line will be interpreted as a record.")
.addValidator(StandardValidators.NON_EMPTY_VALIDATOR) .addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
.expressionLanguageSupported(false) .expressionLanguageSupported(false)
.allowableValues("true", "false") .allowableValues("true", "false")

12
nifi-nar-bundles/nifi-standard-services/nifi-record-serialization-services-bundle/nifi-record-serialization-services/src/main/java/org/apache/nifi/serialization/SchemaRegistryRecordSetWriter.java
View File

@ -36,6 +36,7 @@ import org.apache.nifi.components.PropertyDescriptor;
import org.apache.nifi.components.ValidationContext; import org.apache.nifi.components.ValidationContext;
import org.apache.nifi.components.ValidationResult; import org.apache.nifi.components.ValidationResult;
import org.apache.nifi.controller.ConfigurationContext; import org.apache.nifi.controller.ConfigurationContext;
import org.apache.nifi.schema.access.ConfluentSchemaRegistryWriter;
import org.apache.nifi.schema.access.HortonworksAttributeSchemaReferenceWriter; import org.apache.nifi.schema.access.HortonworksAttributeSchemaReferenceWriter;
import org.apache.nifi.schema.access.HortonworksEncodedSchemaReferenceWriter; import org.apache.nifi.schema.access.HortonworksEncodedSchemaReferenceWriter;
import org.apache.nifi.schema.access.NopSchemaAccessWriter; import org.apache.nifi.schema.access.NopSchemaAccessWriter;
@ -63,6 +64,11 @@ public abstract class SchemaRegistryRecordSetWriter extends SchemaRegistryServic
static final AllowableValue HWX_SCHEMA_REF_ATTRIBUTES = new AllowableValue("hwx-schema-ref-attributes", "HWX Schema Reference Attributes", static final AllowableValue HWX_SCHEMA_REF_ATTRIBUTES = new AllowableValue("hwx-schema-ref-attributes", "HWX Schema Reference Attributes",
"The FlowFile will be given a set of 3 attributes to describe the schema: 'schema.identifier', 'schema.version', and 'schema.protocol.version'. Note that if " "The FlowFile will be given a set of 3 attributes to describe the schema: 'schema.identifier', 'schema.version', and 'schema.protocol.version'. Note that if "
+ "the schema for a record does not contain the necessary identifier and version, an Exception will be thrown when attempting to write the data."); + "the schema for a record does not contain the necessary identifier and version, an Exception will be thrown when attempting to write the data.");
static final AllowableValue CONFLUENT_ENCODED_SCHEMA = new AllowableValue("confluent-encoded", "Confluent Schema Registry Reference",
"The content of the FlowFile will contain a reference to a schema in the Schema Registry service. The reference is encoded as a single "
+ "'Magic Byte' followed by 4 bytes representing the identifier of the schema, as outlined at http://docs.confluent.io/current/schema-registry/docs/serializer-formatter.html. "
+ "This will be prepended to each FlowFile. Note that if the schema for a record does not contain the necessary identifier and version, "
+ "an Exception will be thrown when attempting to write the data. This is based on the encoding used by version 3.2.x of the Confluent Schema Registry.");
static final AllowableValue NO_SCHEMA = new AllowableValue("no-schema", "Do Not Write Schema", "Do not add any schema-related information to the FlowFile."); static final AllowableValue NO_SCHEMA = new AllowableValue("no-schema", "Do Not Write Schema", "Do not add any schema-related information to the FlowFile.");
/** /**
@ -73,8 +79,6 @@ public abstract class SchemaRegistryRecordSetWriter extends SchemaRegistryServic
private static final PropertyDescriptor SCHEMA_WRITE_STRATEGY = new PropertyDescriptor.Builder() private static final PropertyDescriptor SCHEMA_WRITE_STRATEGY = new PropertyDescriptor.Builder()
.name("Schema Write Strategy") .name("Schema Write Strategy")
.description("Specifies how the schema for a Record should be added to the data.") .description("Specifies how the schema for a Record should be added to the data.")
.allowableValues(SCHEMA_NAME_ATTRIBUTE, AVRO_SCHEMA_ATTRIBUTE, HWX_SCHEMA_REF_ATTRIBUTES, HWX_CONTENT_ENCODED_SCHEMA, NO_SCHEMA)
.defaultValue(SCHEMA_NAME_ATTRIBUTE.getValue())
.required(true) .required(true)
.build(); .build();
@ -83,7 +87,7 @@ public abstract class SchemaRegistryRecordSetWriter extends SchemaRegistryServic
private volatile SchemaAccessWriter schemaAccessWriter; private volatile SchemaAccessWriter schemaAccessWriter;
private final List<AllowableValue> schemaWriteStrategyList = Collections.unmodifiableList(Arrays.asList( private final List<AllowableValue> schemaWriteStrategyList = Collections.unmodifiableList(Arrays.asList(
SCHEMA_NAME_ATTRIBUTE, AVRO_SCHEMA_ATTRIBUTE, HWX_SCHEMA_REF_ATTRIBUTES, HWX_CONTENT_ENCODED_SCHEMA, NO_SCHEMA)); SCHEMA_NAME_ATTRIBUTE, AVRO_SCHEMA_ATTRIBUTE, HWX_SCHEMA_REF_ATTRIBUTES, HWX_CONTENT_ENCODED_SCHEMA, CONFLUENT_ENCODED_SCHEMA, NO_SCHEMA));
private final List<AllowableValue> schemaAccessStrategyList = Collections.unmodifiableList(Arrays.asList( private final List<AllowableValue> schemaAccessStrategyList = Collections.unmodifiableList(Arrays.asList(
SCHEMA_NAME_PROPERTY, INHERIT_RECORD_SCHEMA, SCHEMA_TEXT_PROPERTY)); SCHEMA_NAME_PROPERTY, INHERIT_RECORD_SCHEMA, SCHEMA_TEXT_PROPERTY));
@ -156,6 +160,8 @@ public abstract class SchemaRegistryRecordSetWriter extends SchemaRegistryServic
return new HortonworksEncodedSchemaReferenceWriter(); return new HortonworksEncodedSchemaReferenceWriter();
} else if (allowableValue.equalsIgnoreCase(HWX_SCHEMA_REF_ATTRIBUTES.getValue())) { } else if (allowableValue.equalsIgnoreCase(HWX_SCHEMA_REF_ATTRIBUTES.getValue())) {
return new HortonworksAttributeSchemaReferenceWriter(); return new HortonworksAttributeSchemaReferenceWriter();
} else if (allowableValue.equalsIgnoreCase(CONFLUENT_ENCODED_SCHEMA.getValue())) {
return new ConfluentSchemaRegistryWriter();
} else if (allowableValue.equalsIgnoreCase(NO_SCHEMA.getValue())) { } else if (allowableValue.equalsIgnoreCase(NO_SCHEMA.getValue())) {
return new NopSchemaAccessWriter(); return new NopSchemaAccessWriter();
} }

3
nifi-nar-bundles/nifi-standard-services/nifi-record-serialization-services-bundle/nifi-record-serialization-services/src/main/java/org/apache/nifi/serialization/SchemaRegistryService.java
View File

@ -51,6 +51,7 @@ import static org.apache.nifi.schema.access.SchemaAccessUtils.SCHEMA_NAME_PROPER
import static org.apache.nifi.schema.access.SchemaAccessUtils.SCHEMA_REGISTRY; import static org.apache.nifi.schema.access.SchemaAccessUtils.SCHEMA_REGISTRY;
import static org.apache.nifi.schema.access.SchemaAccessUtils.SCHEMA_TEXT; import static org.apache.nifi.schema.access.SchemaAccessUtils.SCHEMA_TEXT;
import static org.apache.nifi.schema.access.SchemaAccessUtils.SCHEMA_TEXT_PROPERTY; import static org.apache.nifi.schema.access.SchemaAccessUtils.SCHEMA_TEXT_PROPERTY;
import static org.apache.nifi.schema.access.SchemaAccessUtils.CONFLUENT_ENCODED_SCHEMA;
public abstract class SchemaRegistryService extends AbstractControllerService { public abstract class SchemaRegistryService extends AbstractControllerService {
@ -59,7 +60,7 @@ public abstract class SchemaRegistryService extends AbstractControllerService {
private static final InputStream EMPTY_INPUT_STREAM = new ByteArrayInputStream(new byte[0]); private static final InputStream EMPTY_INPUT_STREAM = new ByteArrayInputStream(new byte[0]);
private final List<AllowableValue> strategyList = Collections.unmodifiableList(Arrays.asList( private final List<AllowableValue> strategyList = Collections.unmodifiableList(Arrays.asList(
SCHEMA_NAME_PROPERTY, SCHEMA_TEXT_PROPERTY, HWX_SCHEMA_REF_ATTRIBUTES, HWX_CONTENT_ENCODED_SCHEMA)); SCHEMA_NAME_PROPERTY, SCHEMA_TEXT_PROPERTY, HWX_SCHEMA_REF_ATTRIBUTES, HWX_CONTENT_ENCODED_SCHEMA, CONFLUENT_ENCODED_SCHEMA));
protected PropertyDescriptor getSchemaAcessStrategyDescriptor() { protected PropertyDescriptor getSchemaAcessStrategyDescriptor() {
return getPropertyDescriptor(SCHEMA_ACCESS_STRATEGY.getName()); return getPropertyDescriptor(SCHEMA_ACCESS_STRATEGY.getName());

1
nifi-nar-bundles/pom.xml
View File

@ -35,6 +35,7 @@
<module>nifi-kafka-bundle</module> <module>nifi-kafka-bundle</module>
<module>nifi-kite-bundle</module> <module>nifi-kite-bundle</module>
<module>nifi-solr-bundle</module> <module>nifi-solr-bundle</module>
<module>nifi-confluent-platform-bundle</module>
<module>nifi-aws-bundle</module> <module>nifi-aws-bundle</module>
<module>nifi-social-media-bundle</module> <module>nifi-social-media-bundle</module>
<module>nifi-enrich-bundle</module> <module>nifi-enrich-bundle</module>

13
pom.xml
View File

@ -1276,6 +1276,12 @@
<version>1.4.0-SNAPSHOT</version> <version>1.4.0-SNAPSHOT</version>
<type>nar</type> <type>nar</type>
</dependency> </dependency>
<dependency>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-confluent-platform-nar</artifactId>
<version>1.4.0-SNAPSHOT</version>
<type>nar</type>
</dependency>
<dependency> <dependency>
<groupId>org.apache.nifi</groupId> <groupId>org.apache.nifi</groupId>
<artifactId>nifi-kerberos-iaa-providers-nar</artifactId> <artifactId>nifi-kerberos-iaa-providers-nar</artifactId>
@ -1456,7 +1462,7 @@
<version>1.4.0-SNAPSHOT</version> <version>1.4.0-SNAPSHOT</version>
<type>nar</type> <type>nar</type>
</dependency> </dependency>
<dependency> <dependency>
<groupId>org.apache.nifi</groupId> <groupId>org.apache.nifi</groupId>
<artifactId>nifi-properties</artifactId> <artifactId>nifi-properties</artifactId>
<version>1.4.0-SNAPSHOT</version> <version>1.4.0-SNAPSHOT</version>
@ -1471,6 +1477,11 @@
<artifactId>nifi-security-utils</artifactId> <artifactId>nifi-security-utils</artifactId>
<version>1.4.0-SNAPSHOT</version> <version>1.4.0-SNAPSHOT</version>
</dependency> </dependency>
<dependency>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-confluent-schema-registry-service</artifactId>
<version>1.4.0-SNAPSHOT</version>
</dependency>
<dependency> <dependency>
<groupId>org.apache.nifi</groupId> <groupId>org.apache.nifi</groupId>
<artifactId>nifi-logging-utils</artifactId> <artifactId>nifi-logging-utils</artifactId>