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BAEL-3326, "Optimizing JSON Schema for production use": 

More code for slim customer.
This commit is contained in:
Karsten Silz 2020-09-06 13:23:34 +01:00
parent 1a2e8ced2b
commit 9d326b55bc
6 changed files with 187 additions and 18 deletions
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1
json/src/main/java/com/baeldung/jsonoptimization/CustomerDeserializer.java
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@ -43,6 +43,7 @@ public class CustomerDeserializer extends StdDeserializer<Customer> {
feedback.setPhoneNumber(phoneNumber.isNull() ? null : phoneNumber.asText());
JsonNode email = node.get(8);
feedback.setEmail(email.isNull() ? null : email.asText());
return feedback;
}
}

1
json/src/main/java/com/baeldung/jsonoptimization/CustomerShortNames.java
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@ -6,6 +6,7 @@ import com.fasterxml.jackson.annotation.JsonProperty;
public class CustomerShortNames {
@JsonProperty("i")
private long id;
@JsonProperty("f")

37
json/src/main/java/com/baeldung/jsonoptimization/CustomerSlimDeserializer.java Normal file
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@ -0,0 +1,37 @@
package com.baeldung.jsonoptimization;
import java.io.IOException;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.ObjectCodec;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
public class CustomerSlimDeserializer extends StdDeserializer<CustomerSlim> {
private static final long serialVersionUID = 1L;
public CustomerSlimDeserializer() {
this(null);
}
public CustomerSlimDeserializer(Class<CustomerSlim> t) {
super(t);
}
@Override
public CustomerSlim deserialize(JsonParser parser, DeserializationContext deserializer) throws IOException {
CustomerSlim feedback = new CustomerSlim();
ObjectCodec codec = parser.getCodec();
JsonNode node = codec.readTree(parser);
feedback.setId(node.get(0)
.asLong());
feedback.setName(node.get(1)
.asText());
feedback.setAddress(node.get(2)
.asText());
return feedback;
}
}

28
json/src/main/java/com/baeldung/jsonoptimization/CustomerSlimSerializer.java Normal file
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@ -0,0 +1,28 @@
package com.baeldung.jsonoptimization;
import java.io.IOException;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;
public class CustomerSlimSerializer extends StdSerializer<CustomerSlim> {
private static final long serialVersionUID = 1L;
public CustomerSlimSerializer() {
this(null);
}
public CustomerSlimSerializer(Class<CustomerSlim> t) {
super(t);
}
@Override
public void serialize(CustomerSlim customer, JsonGenerator jsonGenerator, SerializerProvider serializer) throws IOException {
jsonGenerator.writeStartArray();
jsonGenerator.writeNumber(customer.getId());
jsonGenerator.writeString(customer.getName());
jsonGenerator.writeString(customer.getAddress());
jsonGenerator.writeEndArray();
}
}

81
json/src/main/java/com/baeldung/jsonoptimization/CustomerSlimShortNames.java Normal file
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@ -0,0 +1,81 @@
package com.baeldung.jsonoptimization;
import java.util.Objects;
import com.fasterxml.jackson.annotation.JsonProperty;
public class CustomerSlimShortNames {
@JsonProperty("i")
private long id;
@JsonProperty("n")
private String name;
@JsonProperty("a")
private String address;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
@Override
public int hashCode() {
return Objects.hash(address, id, name);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof CustomerSlimShortNames)) {
return false;
}
CustomerSlimShortNames other = (CustomerSlimShortNames) obj;
return Objects.equals(address, other.address) && id == other.id && Objects.equals(name, other.name);
}
@Override
public String toString() {
return "CustomerSlim [id=" + id + ", name=" + name + ", address=" + address + "]";
}
public static CustomerSlimShortNames[] fromCustomers(Customer[] customers) {
CustomerSlimShortNames[] feedback = new CustomerSlimShortNames[customers.length];
for (int i = 0; i < customers.length; i++) {
Customer aCustomer = customers[i];
CustomerSlimShortNames newOne = new CustomerSlimShortNames();
newOne.setId(aCustomer.getId());
newOne.setName(aCustomer.getFirstName() + " " + aCustomer.getLastName());
newOne.setAddress(aCustomer.getStreet() + ", " + aCustomer.getCity() + " " + aCustomer.getState() + " " + aCustomer.getPostalCode());
feedback[i] = newOne;
}
return feedback;
}
}

57
json/src/test/java/com/baeldung/jsonoptimization/JsonOptimizationUnitTest.java
View File

@ -23,10 +23,12 @@ import com.fasterxml.jackson.databind.module.SimpleModule;
class JsonOptimizationUnitTest {
private static final String TEST_LABEL_DEFAULT_JSON = "Default JSON";
private static final String TEST_LABEL_DEFAULT_JSON_NO_NULL = "Default JSON without null";
private static final String TEST_LABEL_SHORTER_ATTRIBUTE_NAMES = "Shorter Attribute Names";
private static final String TEST_LABEL_SHORTER_ATTRIBUTE_NAMES_NO_NULL = "Shorter Attribute Names without null";
private static final String TEST_LABEL_CUSTOM_SERIALIZER = "Custom Serializer";
private static final String TEST_LABEL_SHORT_NAMES = "Shorter attribute names";
private static final String TEST_LABEL_SHORT_NAMES_NO_NULL = "Shorter attribute names without null";
private static final String TEST_LABEL_CUSTOM_SERIALIZER = "Custom serializer";
private static final String TEST_LABEL_SLIM_CUSTOM_SERIALIZER = "Slim custom serializer";
private static final String TEST_LABEL_SLIM_CUSTOMER = "Slim customer";
private static final String TEST_LABEL_SLIM_CUSTOMER_SHORT_NAMES = "Slim customer with shorter attribute names";
private static DecimalFormat LENGTH_FORMATTER = new DecimalFormat("###,###,###");
private static Customer[] customers;
private ObjectMapper mapper;
@ -62,19 +64,19 @@ class JsonOptimizationUnitTest {
}
@Test
void testShorterAttributes() throws IOException {
printBanner(TEST_LABEL_SHORTER_ATTRIBUTE_NAMES);
void testShortNames() throws IOException {
printBanner(TEST_LABEL_SHORT_NAMES);
CustomerShortNames[] shorterOnes = CustomerShortNames.fromCustomers(customers);
byte[] shorterJson = createPlainJson(TEST_LABEL_SHORTER_ATTRIBUTE_NAMES, shorterOnes);
compressJson(TEST_LABEL_SHORTER_ATTRIBUTE_NAMES, shorterJson);
byte[] shorterJson = createPlainJson(TEST_LABEL_SHORT_NAMES, shorterOnes);
compressJson(TEST_LABEL_SHORT_NAMES, shorterJson);
}
@Test
void testShorterAttributesNoNull() throws IOException {
printBanner(TEST_LABEL_SHORTER_ATTRIBUTE_NAMES_NO_NULL);
void testShortNamesNoNull() throws IOException {
printBanner(TEST_LABEL_SHORT_NAMES_NO_NULL);
CustomerShortNamesNoNull[] shorterOnesNoNull = CustomerShortNamesNoNull.fromCustomers(customers);
byte[] shorterJson = createPlainJson(TEST_LABEL_SHORTER_ATTRIBUTE_NAMES_NO_NULL, shorterOnesNoNull);
compressJson(TEST_LABEL_SHORTER_ATTRIBUTE_NAMES_NO_NULL, shorterJson);
byte[] shorterJson = createPlainJson(TEST_LABEL_SHORT_NAMES_NO_NULL, shorterOnesNoNull);
compressJson(TEST_LABEL_SHORT_NAMES_NO_NULL, shorterJson);
}
@Test
@ -85,21 +87,40 @@ class JsonOptimizationUnitTest {
compressJson(TEST_LABEL_SLIM_CUSTOMER, slimJson);
}
@Test
void testSlimShortNames() throws IOException {
printBanner(TEST_LABEL_SLIM_CUSTOMER_SHORT_NAMES);
CustomerSlimShortNames[] slimOnes = CustomerSlimShortNames.fromCustomers(customers);
byte[] slimJson = createPlainJson(TEST_LABEL_SLIM_CUSTOMER_SHORT_NAMES, slimOnes);
compressJson(TEST_LABEL_SLIM_CUSTOMER_SHORT_NAMES, slimJson);
}
@Test
void testCustomSerializer() throws IOException {
printBanner(TEST_LABEL_CUSTOM_SERIALIZER);
SimpleModule serializer = new SimpleModule("CustomCustomerSerializer", new Version(1, 0, 0, null, null, null));
SimpleModule serializer = new SimpleModule("CustomDeSerializer", new Version(1, 0, 0, null, null, null));
serializer.addSerializer(Customer.class, new CustomerSerializer());
serializer.addDeserializer(Customer.class, new CustomerDeserializer());
mapper.registerModule(serializer);
SimpleModule deserializer = new SimpleModule("CustomCustomerDeserializer", new Version(1, 0, 0, null, null, null));
deserializer.addDeserializer(Customer.class, new CustomerDeserializer());
mapper.registerModule(deserializer);
byte[] plainJson = createPlainJson(TEST_LABEL_CUSTOM_SERIALIZER, customers);
compressJson(TEST_LABEL_CUSTOM_SERIALIZER, plainJson);
}
@Test
void testSlimCustomSerializer() throws IOException {
printBanner(TEST_LABEL_SLIM_CUSTOM_SERIALIZER);
SimpleModule serializer = new SimpleModule("SlimCustomDeSerializer", new Version(1, 0, 0, null, null, null));
serializer.addSerializer(CustomerSlim.class, new CustomerSlimSerializer());
serializer.addDeserializer(CustomerSlim.class, new CustomerSlimDeserializer());
mapper.registerModule(serializer);
CustomerSlim[] slimOnes = CustomerSlim.fromCustomers(customers);
byte[] plainJson = createPlainJson(TEST_LABEL_SLIM_CUSTOM_SERIALIZER, slimOnes);
compressJson(TEST_LABEL_SLIM_CUSTOM_SERIALIZER, plainJson);
}
private void printBanner(String name) {
System.out.println();