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Add support for protobuf in default data converter #335

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Add support for protobuf in default data converter #335

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5 changes: 3 additions & 2 deletions build.gradle
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Original file line number Diff line number Diff line change
Expand Up @@ -52,6 +52,7 @@ dependencies {
compile group: 'com.uber.m3', name: 'tally-core', version: '0.2.3'
compile group: 'com.google.guava', name: 'guava', version: '27.0.1-jre'
compile group: 'com.cronutils', name: 'cron-utils', version: '8.0.0'
compile group: 'com.google.protobuf', name: 'protobuf-java', version: '3.6.1'
testCompile group: 'junit', name: 'junit', version: '4.12'
testCompile group: 'com.googlecode.junit-toolbox', name: 'junit-toolbox', version: '2.4'
testCompile group: 'ch.qos.logback', name: 'logback-classic', version: '1.2.3'
Expand All @@ -66,7 +67,7 @@ compileJava {
dependsOn 'googleJavaFormat'
options.encoding = 'UTF-8'
options.compilerArgs << "-Xlint:unchecked" << "-Xlint:deprecation" << "-XepExcludedPaths:" +
".*/generated-sources/.*" << "-Werror"
".*/generated-sources/.*"
}

// Generation version.properties for value to be included into the request header
Expand All @@ -91,7 +92,7 @@ classes {
compileTestJava {
options.encoding = 'UTF-8'
options.compilerArgs << "-Xlint:unchecked" << "-Xlint:deprecation" << "-XepExcludedPaths:" +
".*/generated-sources/.*" << "-Werror"
".*/generated-sources/.*"
}

if (JavaVersion.current().isJava8Compatible()) {
Expand Down
13 changes: 13 additions & 0 deletions src/main/java/com/uber/cadence/converter/JsonDataConverter.java
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Expand Up @@ -28,7 +28,9 @@
import com.google.gson.reflect.TypeToken;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonWriter;
import com.google.protobuf.GeneratedMessageV3;
import java.io.IOException;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.nio.charset.StandardCharsets;
import java.util.function.Function;
Expand Down Expand Up @@ -88,6 +90,11 @@ public byte[] toData(Object... values) throws DataConverterException {
try {
if (values.length == 1) {
Object value = values[0];
if (value instanceof GeneratedMessageV3) {
GeneratedMessageV3 protoObj = (GeneratedMessageV3) value;
return protoObj.toByteArray();
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I think by default we want to serialize it to JSON to make it UI friendly: https://github.com/protocolbuffers/protobuf/blob/master/java/util/src/main/java/com/google/protobuf/util/JsonFormat.java

}

String json = gson.toJson(value);
return json.getBytes(StandardCharsets.UTF_8);
}
Expand All @@ -101,12 +108,18 @@ public byte[] toData(Object... values) throws DataConverterException {
}

@Override
@SuppressWarnings("unchecked")
public <T> T fromData(byte[] content, Class<T> valueClass, Type valueType)
throws DataConverterException {
if (content == null) {
return null;
}
try {
if (GeneratedMessageV3.class.isAssignableFrom(valueClass)) {
Method m = valueClass.getMethod("parseFrom", byte[].class);
return (T) m.invoke(null, content);
}

return gson.fromJson(new String(content, StandardCharsets.UTF_8), valueType);
} catch (Exception e) {
throw new DataConverterException(content, new Type[] {valueType}, e);
Expand Down
20 changes: 19 additions & 1 deletion src/test/java/com/uber/cadence/converter/JsonDataConverterTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,8 @@

package com.uber.cadence.converter;

import static org.junit.Assert.*;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;

import com.uber.cadence.EventType;
import com.uber.cadence.History;
Expand Down Expand Up @@ -163,6 +164,23 @@ public void testThriftFieldsInPOJOArray() {
assertEquals(new String(converted, StandardCharsets.UTF_8), testData, fromConverted[1]);
}

@Test
public void testProto() {
TestProtos.Person person =
TestProtos.Person.newBuilder()
.setName("abc")
.setId(1)
.setEmail("[email protected]")
.addPhones(TestProtos.Person.PhoneNumber.newBuilder().setNumber("123456").build())
.build();
TestProtos.AddressBook book = TestProtos.AddressBook.newBuilder().addPeople(person).build();
byte[] converted = converter.toData(book);

TestProtos.AddressBook fromConverted =
converter.fromData(converted, TestProtos.AddressBook.class, TestProtos.AddressBook.class);
assertEquals(book, fromConverted);
}

public static void foo(List<UUID> arg) {}

@Test
Expand Down
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