Merge pull request #9937 from ashleyfrieze/BAEL-3998-aws-lambda-hibernate

BAEL-3998-Aws Lambda with Hibernate

aws-lambda/lambda/pom.xml

@@ -0,0 +1,100 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<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>
+    <artifactId>aws-lambda-examples</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <name>aws-lambda-examples</name>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+        <relativePath>../../</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.amazonaws</groupId>
+            <artifactId>aws-java-sdk-dynamodb</artifactId>
+            <version>${aws-java-sdk.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.amazonaws</groupId>
+            <artifactId>aws-java-sdk-core</artifactId>
+            <version>${aws-java-sdk.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.amazonaws</groupId>
+            <artifactId>aws-lambda-java-core</artifactId>
+            <version>${aws-lambda-java-core.version}</version>
+            <exclusions>
+                <exclusion>
+                    <artifactId>commons-logging</artifactId>
+                    <groupId>commons-logging</groupId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+        <dependency>
+            <groupId>com.amazonaws</groupId>
+            <artifactId>aws-lambda-java-events</artifactId>
+            <version>${aws-lambda-java-events.version}</version>
+            <exclusions>
+                <exclusion>
+                    <artifactId>commons-logging</artifactId>
+                    <groupId>commons-logging</groupId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+        <dependency>
+            <groupId>com.google.code.gson</groupId>
+            <artifactId>gson</artifactId>
+            <version>${gson.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>commons-io</groupId>
+            <artifactId>commons-io</artifactId>
+            <version>${commons-io.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.googlecode.json-simple</groupId>
+            <artifactId>json-simple</artifactId>
+            <version>${json-simple.version}</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>${maven-shade-plugin.version}</version>
+                <configuration>
+                    <createDependencyReducedPom>false</createDependencyReducedPom>
+                </configuration>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+        <json-simple.version>1.1.1</json-simple.version>
+        <commons-io.version>2.5</commons-io.version>
+        <aws-lambda-java-events.version>1.3.0</aws-lambda-java-events.version>
+        <aws-lambda-java-core.version>1.2.0</aws-lambda-java-core.version>
+        <gson.version>2.8.2</gson.version>
+        <aws-java-sdk.version>1.11.241</aws-java-sdk.version>
+        <maven-shade-plugin.version>3.0.0</maven-shade-plugin.version>
+    </properties>
+
+</project>

aws-lambda/pom.xml

@@ -5,95 +5,19 @@
     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>
     <artifactId>aws-lambda</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
     <name>aws-lambda</name>
-    <packaging>jar</packaging>
+    <packaging>pom</packaging>
 
     <parent>
         <groupId>com.baeldung</groupId>
         <artifactId>parent-modules</artifactId>
         <version>1.0.0-SNAPSHOT</version>
+        <relativePath>../</relativePath>
     </parent>
 
-    <dependencies>
+    <modules>
-        <dependency>
+        <module>lambda</module>
-            <groupId>com.amazonaws</groupId>
+        <module>shipping-tracker/ShippingFunction</module>
-            <artifactId>aws-java-sdk-dynamodb</artifactId>
+    </modules>
-            <version>${aws-java-sdk.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>com.amazonaws</groupId>
-            <artifactId>aws-java-sdk-core</artifactId>
-            <version>${aws-java-sdk.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>com.amazonaws</groupId>
-            <artifactId>aws-lambda-java-core</artifactId>
-            <version>${aws-lambda-java-core.version}</version>
-            <exclusions>
-                <exclusion>
-                    <artifactId>commons-logging</artifactId>
-                    <groupId>commons-logging</groupId>
-                </exclusion>
-            </exclusions>
-        </dependency>
-        <dependency>
-            <groupId>com.amazonaws</groupId>
-            <artifactId>aws-lambda-java-events</artifactId>
-            <version>${aws-lambda-java-events.version}</version>
-            <exclusions>
-                <exclusion>
-                    <artifactId>commons-logging</artifactId>
-                    <groupId>commons-logging</groupId>
-                </exclusion>
-            </exclusions>
-        </dependency>
-        <dependency>
-            <groupId>com.google.code.gson</groupId>
-            <artifactId>gson</artifactId>
-            <version>${gson.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>commons-io</groupId>
-            <artifactId>commons-io</artifactId>
-            <version>${commons-io.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>com.googlecode.json-simple</groupId>
-            <artifactId>json-simple</artifactId>
-            <version>${json-simple.version}</version>
-        </dependency>
-    </dependencies>
 
-    <build>
+</project>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-shade-plugin</artifactId>
-                <version>${maven-shade-plugin.version}</version>
-                <configuration>
-                    <createDependencyReducedPom>false</createDependencyReducedPom>
-                </configuration>
-                <executions>
-                    <execution>
-                        <phase>package</phase>
-                        <goals>
-                            <goal>shade</goal>
-                        </goals>
-                    </execution>
-                </executions>
-            </plugin>
-        </plugins>
-    </build>
-
-    <properties>
-        <json-simple.version>1.1.1</json-simple.version>
-        <commons-io.version>2.5</commons-io.version>
-        <aws-lambda-java-events.version>1.3.0</aws-lambda-java-events.version>
-        <aws-lambda-java-core.version>1.2.0</aws-lambda-java-core.version>
-        <gson.version>2.8.2</gson.version>
-        <aws-java-sdk.version>1.11.241</aws-java-sdk.version>
-        <maven-shade-plugin.version>3.0.0</maven-shade-plugin.version>
-    </properties>
-
-</project>

aws-lambda/shipping-tracker/.gitignore

@@ -0,0 +1 @@
+.aws-sam/

aws-lambda/shipping-tracker/ShippingFunction/pom.xml

@@ -0,0 +1,73 @@
+<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/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.baeldung</groupId>
+    <artifactId>ShippingFunction</artifactId>
+    <version>1.0</version>
+    <packaging>jar</packaging>
+    <name>Shipping Tracker Lambda Function</name>
+    <properties>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+        <hibernate.version>5.4.21.Final</hibernate.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.amazonaws</groupId>
+            <artifactId>aws-lambda-java-core</artifactId>
+            <version>1.2.0</version>
+        </dependency>
+        <dependency>
+          <groupId>com.amazonaws</groupId>
+          <artifactId>aws-lambda-java-events</artifactId>
+          <version>3.1.0</version>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>2.11.2</version>
+        </dependency>
+        <dependency>
+          <groupId>junit</groupId>
+          <artifactId>junit</artifactId>
+          <version>4.12</version>
+          <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.hibernate</groupId>
+            <artifactId>hibernate-core</artifactId>
+            <version>${hibernate.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.hibernate</groupId>
+            <artifactId>hibernate-hikaricp</artifactId>
+            <version>${hibernate.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.postgresql</groupId>
+            <artifactId>postgresql</artifactId>
+            <version>42.2.16</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+      <plugins>
+        <plugin>
+          <groupId>org.apache.maven.plugins</groupId>
+          <artifactId>maven-shade-plugin</artifactId>
+          <version>3.1.1</version>
+          <configuration>
+          </configuration>
+          <executions>
+            <execution>
+              <phase>package</phase>
+              <goals>
+                <goal>shade</goal>
+              </goals>
+            </execution>
+          </executions>
+        </plugin>
+      </plugins>
+    </build>
+</project>

aws-lambda/shipping-tracker/ShippingFunction/src/main/java/com/baeldung/lambda/shipping/App.java

@@ -0,0 +1,108 @@
+package com.baeldung.lambda.shipping;
+
+import com.amazonaws.services.lambda.runtime.Context;
+import com.amazonaws.services.lambda.runtime.RequestHandler;
+import com.amazonaws.services.lambda.runtime.events.APIGatewayProxyRequestEvent;
+import com.amazonaws.services.lambda.runtime.events.APIGatewayProxyResponseEvent;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.hibernate.SessionFactory;
+import org.hibernate.boot.MetadataSources;
+import org.hibernate.boot.registry.StandardServiceRegistry;
+import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import static org.hibernate.cfg.AvailableSettings.*;
+import static org.hibernate.cfg.AvailableSettings.PASS;
+
+/**
+ * Handler for requests to Lambda function.
+ */
+public class App implements RequestHandler<APIGatewayProxyRequestEvent, APIGatewayProxyResponseEvent> {
+private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
+
+    public APIGatewayProxyResponseEvent handleRequest(APIGatewayProxyRequestEvent input, Context context) {
+        try (SessionFactory sessionFactory = createSessionFactory()) {
+            ShippingService service = new ShippingService(sessionFactory, new ShippingDao());
+            return routeRequest(input, service);
+        }
+    }
+
+    private APIGatewayProxyResponseEvent routeRequest(APIGatewayProxyRequestEvent input, ShippingService service) {
+        Map<String, String> headers = new HashMap<>();
+        headers.put("Content-Type", "application/json");
+        headers.put("X-Custom-Header", "application/json");
+
+        Object result = "OK";
+
+        switch (input.getResource()) {
+            case "/consignment":
+                result = service.createConsignment(
+                  fromJson(input.getBody(), Consignment.class));
+                break;
+            case "/consignment/{id}":
+                result = service.view(input.getPathParameters().get("id"));
+                break;
+            case "/consignment/{id}/item":
+                service.addItem(input.getPathParameters().get("id"),
+                  fromJson(input.getBody(), Item.class));
+                break;
+            case "/consignment/{id}/checkin":
+                service.checkIn(input.getPathParameters().get("id"),
+                  fromJson(input.getBody(), Checkin.class));
+                break;
+        }
+
+        return new APIGatewayProxyResponseEvent()
+          .withHeaders(headers)
+          .withStatusCode(200)
+          .withBody(toJson(result));
+    }
+
+    private static <T> String toJson(T object) {
+        try {
+            return OBJECT_MAPPER.writeValueAsString(object);
+        } catch (JsonProcessingException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private static <T> T fromJson(String json, Class<T> type) {
+        try {
+            return OBJECT_MAPPER.readValue(json, type);
+        } catch (JsonProcessingException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private static SessionFactory createSessionFactory() {
+        Map<String, String> settings = new HashMap<>();
+        settings.put(URL, System.getenv("DB_URL"));
+        settings.put(DIALECT, "org.hibernate.dialect.PostgreSQLDialect");
+        settings.put(DEFAULT_SCHEMA, "shipping");
+        settings.put(DRIVER, "org.postgresql.Driver");
+        settings.put(USER, System.getenv("DB_USER"));
+        settings.put(PASS, System.getenv("DB_PASSWORD"));
+        settings.put("hibernate.hikari.connectionTimeout", "20000");
+        settings.put("hibernate.hikari.minimumIdle", "1");
+        settings.put("hibernate.hikari.maximumPoolSize", "2");
+        settings.put("hibernate.hikari.idleTimeout", "30000");
+
+// commented out as we only need them on first use
+//        settings.put(HBM2DDL_AUTO, "create-only");
+//        settings.put(HBM2DDL_DATABASE_ACTION, "create");
+
+        StandardServiceRegistry registry = new StandardServiceRegistryBuilder()
+          .applySettings(settings)
+          .build();
+
+        return new MetadataSources(registry)
+          .addAnnotatedClass(Consignment.class)
+          .addAnnotatedClass(Item.class)
+          .addAnnotatedClass(Checkin.class)
+          .buildMetadata()
+          .buildSessionFactory();
+    }
+}

aws-lambda/shipping-tracker/ShippingFunction/src/main/java/com/baeldung/lambda/shipping/Checkin.java

@@ -0,0 +1,28 @@
+package com.baeldung.lambda.shipping;
+
+import javax.persistence.Column;
+import javax.persistence.Embeddable;
+
+@Embeddable
+public class Checkin {
+    private String timeStamp;
+    private String location;
+
+    @Column(name = "timestamp")
+    public String getTimeStamp() {
+        return timeStamp;
+    }
+
+    public void setTimeStamp(String timeStamp) {
+        this.timeStamp = timeStamp;
+    }
+
+    @Column(name = "location")
+    public String getLocation() {
+        return location;
+    }
+
+    public void setLocation(String location) {
+        this.location = location;
+    }
+}

aws-lambda/shipping-tracker/ShippingFunction/src/main/java/com/baeldung/lambda/shipping/Consignment.java

@@ -0,0 +1,77 @@
+package com.baeldung.lambda.shipping;
+
+import javax.persistence.*;
+import java.util.ArrayList;
+import java.util.List;
+
+import static javax.persistence.FetchType.EAGER;
+
+@Entity(name = "consignment")
+@Table(name = "consignment")
+public class Consignment {
+    private String id;
+    private String source;
+    private String destination;
+    private boolean isDelivered;
+    private List<Item> items = new ArrayList<>();
+    private List<Checkin> checkins = new ArrayList<>();
+
+    @Id
+    @Column(name = "consignment_id")
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    @Column(name = "source")
+    public String getSource() {
+        return source;
+    }
+
+    public void setSource(String source) {
+        this.source = source;
+    }
+
+    @Column(name = "destination")
+    public String getDestination() {
+        return destination;
+    }
+
+    public void setDestination(String destination) {
+        this.destination = destination;
+    }
+
+    @Column(name = "delivered", columnDefinition = "boolean")
+    public boolean isDelivered() {
+        return isDelivered;
+    }
+
+    public void setDelivered(boolean delivered) {
+        isDelivered = delivered;
+    }
+
+    @ElementCollection(fetch = EAGER)
+    @CollectionTable(name = "consignment_item", joinColumns = @JoinColumn(name = "consignment_id"))
+    @OrderColumn(name = "item_index")
+    public List<Item> getItems() {
+        return items;
+    }
+
+    public void setItems(List<Item> items) {
+        this.items = items;
+    }
+
+    @ElementCollection(fetch = EAGER)
+    @CollectionTable(name = "consignment_checkin", joinColumns = @JoinColumn(name = "consignment_id"))
+    @OrderColumn(name = "checkin_index")
+    public List<Checkin> getCheckins() {
+        return checkins;
+    }
+
+    public void setCheckins(List<Checkin> checkins) {
+        this.checkins = checkins;
+    }
+}

aws-lambda/shipping-tracker/ShippingFunction/src/main/java/com/baeldung/lambda/shipping/Item.java

@@ -0,0 +1,38 @@
+package com.baeldung.lambda.shipping;
+
+import javax.persistence.Column;
+import javax.persistence.Embeddable;
+
+@Embeddable
+public class Item {
+    private String location;
+    private String description;
+    private String timeStamp;
+
+    @Column(name = "location")
+    public String getLocation() {
+        return location;
+    }
+
+    public void setLocation(String location) {
+        this.location = location;
+    }
+
+    @Column(name = "description")
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    @Column(name = "timestamp")
+    public String getTimeStamp() {
+        return timeStamp;
+    }
+
+    public void setTimeStamp(String timeStamp) {
+        this.timeStamp = timeStamp;
+    }
+}

aws-lambda/shipping-tracker/ShippingFunction/src/main/java/com/baeldung/lambda/shipping/ShippingDao.java

@@ -0,0 +1,25 @@
+package com.baeldung.lambda.shipping;
+
+import org.hibernate.Session;
+import org.hibernate.Transaction;
+
+import java.util.Optional;
+
+public class ShippingDao {
+    /**
+     * Save a consignment to the database
+     * @param consignment the consignment to save
+     */
+    public void save(Session session, Consignment consignment) {
+        Transaction transaction = session.beginTransaction();
+        session.save(consignment);
+        transaction.commit();
+    }
+
+    /**
+     * Find a consignment in the database by id
+     */
+    public Optional<Consignment> find(Session session, String id) {
+        return Optional.ofNullable(session.get(Consignment.class, id));
+    }
+}

aws-lambda/shipping-tracker/ShippingFunction/src/main/java/com/baeldung/lambda/shipping/ShippingService.java

@@ -0,0 +1,62 @@
+package com.baeldung.lambda.shipping;
+
+import org.hibernate.Session;
+import org.hibernate.SessionFactory;
+
+import java.util.Comparator;
+import java.util.UUID;
+
+public class ShippingService {
+    private SessionFactory sessionFactory;
+    private ShippingDao shippingDao;
+
+    public ShippingService(SessionFactory sessionFactory, ShippingDao shippingDao) {
+        this.sessionFactory = sessionFactory;
+        this.shippingDao = shippingDao;
+    }
+
+    public String createConsignment(Consignment consignment) {
+        try (Session session = sessionFactory.openSession()) {
+            consignment.setDelivered(false);
+            consignment.setId(UUID.randomUUID().toString());
+            shippingDao.save(session, consignment);
+            return consignment.getId();
+        }
+    }
+
+    public void addItem(String consignmentId, Item item) {
+        try (Session session = sessionFactory.openSession()) {
+            shippingDao.find(session, consignmentId)
+              .ifPresent(consignment -> addItem(session, consignment, item));
+        }
+    }
+
+    private void addItem(Session session, Consignment consignment, Item item) {
+        consignment.getItems()
+          .add(item);
+        shippingDao.save(session, consignment);
+    }
+
+    public void checkIn(String consignmentId, Checkin checkin) {
+        try (Session session = sessionFactory.openSession()) {
+            shippingDao.find(session, consignmentId)
+              .ifPresent(consignment -> checkIn(session, consignment, checkin));
+        }
+    }
+
+    private void checkIn(Session session, Consignment consignment, Checkin checkin) {
+        consignment.getCheckins().add(checkin);
+        consignment.getCheckins().sort(Comparator.comparing(Checkin::getTimeStamp));
+        if (checkin.getLocation().equals(consignment.getDestination())) {
+            consignment.setDelivered(true);
+        }
+        shippingDao.save(session, consignment);
+    }
+
+    public Consignment view(String consignmentId) {
+        try (Session session = sessionFactory.openSession()) {
+            return shippingDao.find(session, consignmentId)
+              .orElseGet(Consignment::new);
+        }
+    }
+}

aws-lambda/shipping-tracker/template.yaml

@@ -0,0 +1,47 @@
+AWSTemplateFormatVersion: '2010-09-09'
+Transform: AWS::Serverless-2016-10-31
+Description: >
+  shipping-tracker
+
+  Sample SAM Template for shipping-tracker
+
+# More info about Globals: https://github.com/awslabs/serverless-application-model/blob/master/docs/globals.rst
+Globals:
+  Function:
+    Timeout: 20
+
+Resources:
+  ShippingFunction:
+    Type: AWS::Serverless::Function
+    Properties:
+      CodeUri: ShippingFunction
+      Handler: com.baeldung.lambda.shipping.App::handleRequest
+      Runtime: java8
+      MemorySize: 512
+      Environment:
+        Variables:
+          DB_URL: jdbc:postgresql://postgres/postgres
+          DB_USER: postgres
+          DB_PASSWORD: password
+      Events:
+        CreateConsignment:
+          Type: Api
+          Properties:
+            Path: /consignment
+            Method: post
+        AddItem:
+          Type: Api
+          Properties:
+            Path: /consignment/{id}/item
+            Method: post
+        CheckIn:
+          Type: Api
+          Properties:
+            Path: /consignment/{id}/checkin
+            Method: post
+        ViewConsignment:
+          Type: Api
+          Properties:
+            Path: /consignment/{id}
+            Method: get
+