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Upgrade to Protobuf Java Format 1.4

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Issue: SPR-14171
This commit is contained in:
Juergen Hoeller
2016-04-14 15:44:53 +02:00
parent 62ce9afe3a
commit 977734cc59
3 changed files with 80 additions and 77 deletions
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137
spring-web/src/main/java/org/springframework/http/converter/protobuf/ProtobufHttpMessageConverter.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2002-2014 the original author or authors.
* Copyright 2002-2016 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -28,9 +28,9 @@ import com.google.protobuf.Message;
import com.google.protobuf.TextFormat;
import com.googlecode.protobuf.format.HtmlFormat;
import com.googlecode.protobuf.format.JsonFormat;
import com.googlecode.protobuf.format.ProtobufFormatter;
import com.googlecode.protobuf.format.XmlFormat;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpInputMessage;
import org.springframework.http.HttpOutputMessage;
import org.springframework.http.MediaType;
@@ -41,20 +41,19 @@ import org.springframework.util.FileCopyUtils;
/**
* An {@code HttpMessageConverter} that can read and write Protobuf
* {@link com.google.protobuf.Message} using
* <a href="https://developers.google.com/protocol-buffers/">Google Protocol buffers</a>.
* An {@code HttpMessageConverter} that reads and writes {@link com.google.protobuf.Message}s
* using <a href="https://developers.google.com/protocol-buffers/">Google Protocol Buffers</a>.
*
* <p>By default it supports {@code "application/json"}, {@code "application/xml"},
* {@code "text/plain"} and {@code "application/x-protobuf"} while writing also
* supports {@code "text/html"}
* <p>By default, it supports {@code "application/x-protobuf"}, {@code "text/plain"},
* {@code "application/json"}, {@code "application/xml"}, while also writing {@code "text/html"}.
*
* <p>To generate Message Java classes you need to install the protoc binary.
* <p>To generate {@code Message} Java classes, you need to install the {@code protoc} binary.
*
* <p>Tested against Protobuf version 2.5.0.
* <p>Requires Protobuf 2.6 and Protobuf Java Format 1.4, as of Spring 4.3.
*
* @author Alex Antonov
* @author Brian Clozel
* @author Juergen Hoeller
* @since 4.1
*/
public class ProtobufHttpMessageConverter extends AbstractHttpMessageConverter<Message> {
@@ -67,10 +66,17 @@ public class ProtobufHttpMessageConverter extends AbstractHttpMessageConverter<M
public static final String X_PROTOBUF_MESSAGE_HEADER = "X-Protobuf-Message";
private static final ProtobufFormatter JSON_FORMAT = new JsonFormat();
private static final ProtobufFormatter XML_FORMAT = new XmlFormat();
private static final ProtobufFormatter HTML_FORMAT = new HtmlFormat();
private static final ConcurrentHashMap<Class<?>, Method> methodCache = new ConcurrentHashMap<Class<?>, Method>();
private ExtensionRegistry extensionRegistry = ExtensionRegistry.newInstance();
private final ExtensionRegistry extensionRegistry = ExtensionRegistry.newInstance();
/**
@@ -85,7 +91,7 @@ public class ProtobufHttpMessageConverter extends AbstractHttpMessageConverter<M
* that allows the registration of message extensions.
*/
public ProtobufHttpMessageConverter(ExtensionRegistryInitializer registryInitializer) {
super(PROTOBUF, MediaType.TEXT_PLAIN, MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON);
super(PROTOBUF, MediaType.TEXT_PLAIN, MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML);
if (registryInitializer != null) {
registryInitializer.initializeExtensionRegistry(this.extensionRegistry);
}
@@ -97,65 +103,53 @@ public class ProtobufHttpMessageConverter extends AbstractHttpMessageConverter<M
return Message.class.isAssignableFrom(clazz);
}
@Override
protected MediaType getDefaultContentType(Message message) {
return PROTOBUF;
}
@Override
protected Message readInternal(Class<? extends Message> clazz, HttpInputMessage inputMessage)
throws IOException, HttpMessageNotReadableException {
MediaType contentType = inputMessage.getHeaders().getContentType();
contentType = (contentType != null ? contentType : PROTOBUF);
Charset charset = getCharset(inputMessage.getHeaders());
InputStreamReader reader = new InputStreamReader(inputMessage.getBody(), charset);
if (contentType == null) {
contentType = PROTOBUF;
}
Charset charset = contentType.getCharSet();
if (charset == null) {
charset = DEFAULT_CHARSET;
}
try {
Message.Builder builder = getMessageBuilder(clazz);
if (MediaType.APPLICATION_JSON.isCompatibleWith(contentType)) {
JsonFormat.merge(reader, this.extensionRegistry, builder);
}
else if (MediaType.TEXT_PLAIN.isCompatibleWith(contentType)) {
if (MediaType.TEXT_PLAIN.isCompatibleWith(contentType)) {
InputStreamReader reader = new InputStreamReader(inputMessage.getBody(), charset);
TextFormat.merge(reader, this.extensionRegistry, builder);
}
else if (MediaType.APPLICATION_JSON.isCompatibleWith(contentType)) {
JSON_FORMAT.merge(inputMessage.getBody(), charset, this.extensionRegistry, builder);
}
else if (MediaType.APPLICATION_XML.isCompatibleWith(contentType)) {
XmlFormat.merge(reader, this.extensionRegistry, builder);
XML_FORMAT.merge(inputMessage.getBody(), charset, this.extensionRegistry, builder);
}
else {
builder.mergeFrom(inputMessage.getBody(), this.extensionRegistry);
}
return builder.build();
}
catch (Exception e) {
throw new HttpMessageNotReadableException("Could not read Protobuf message: " + e.getMessage(), e);
catch (Exception ex) {
throw new HttpMessageNotReadableException("Could not read Protobuf message: " + ex.getMessage(), ex);
}
}
private Charset getCharset(HttpHeaders headers) {
if (headers == null || headers.getContentType() == null || headers.getContentType().getCharSet() == null) {
return DEFAULT_CHARSET;
}
return headers.getContentType().getCharSet();
}
/**
* Create a new {@code Message.Builder} instance for the given class.
* <p>This method uses a ConcurrentHashMap for caching method lookups.
*/
private Message.Builder getMessageBuilder(Class<? extends Message> clazz) throws Exception {
Method method = methodCache.get(clazz);
if (method == null) {
method = clazz.getMethod("newBuilder");
methodCache.put(clazz, method);
}
return (Message.Builder) method.invoke(clazz);
}
/**
* This method overrides the parent implementation, since this HttpMessageConverter
* can also produce {@code MediaType.HTML "text/html"} ContentType.
*/
@Override
protected boolean canWrite(MediaType mediaType) {
return super.canWrite(mediaType) || MediaType.TEXT_HTML.isCompatibleWith(mediaType);
return (super.canWrite(mediaType) || MediaType.TEXT_HTML.isCompatibleWith(mediaType));
}
@Override
@@ -163,27 +157,27 @@ public class ProtobufHttpMessageConverter extends AbstractHttpMessageConverter<M
throws IOException, HttpMessageNotWritableException {
MediaType contentType = outputMessage.getHeaders().getContentType();
Charset charset = getCharset(contentType);
if (contentType == null) {
contentType = getDefaultContentType(message);
}
Charset charset = contentType.getCharSet();
if (charset == null) {
charset = DEFAULT_CHARSET;
}
if (MediaType.TEXT_HTML.isCompatibleWith(contentType)) {
final OutputStreamWriter outputStreamWriter = new OutputStreamWriter(outputMessage.getBody(), charset);
HtmlFormat.print(message, outputStreamWriter);
outputStreamWriter.flush();
}
else if (MediaType.APPLICATION_JSON.isCompatibleWith(contentType)) {
final OutputStreamWriter outputStreamWriter = new OutputStreamWriter(outputMessage.getBody(), charset);
JsonFormat.print(message, outputStreamWriter);
outputStreamWriter.flush();
}
else if (MediaType.TEXT_PLAIN.isCompatibleWith(contentType)) {
final OutputStreamWriter outputStreamWriter = new OutputStreamWriter(outputMessage.getBody(), charset);
if (MediaType.TEXT_PLAIN.isCompatibleWith(contentType)) {
OutputStreamWriter outputStreamWriter = new OutputStreamWriter(outputMessage.getBody(), charset);
TextFormat.print(message, outputStreamWriter);
outputStreamWriter.flush();
}
else if (MediaType.APPLICATION_JSON.isCompatibleWith(contentType)) {
JSON_FORMAT.print(message, outputMessage.getBody(), charset);
}
else if (MediaType.APPLICATION_XML.isCompatibleWith(contentType)) {
final OutputStreamWriter outputStreamWriter = new OutputStreamWriter(outputMessage.getBody(), charset);
XmlFormat.print(message, outputStreamWriter);
outputStreamWriter.flush();
XML_FORMAT.print(message, outputMessage.getBody(), charset);
}
else if (MediaType.TEXT_HTML.isCompatibleWith(contentType)) {
HTML_FORMAT.print(message, outputMessage.getBody(), charset);
}
else if (PROTOBUF.isCompatibleWith(contentType)) {
setProtoHeader(outputMessage, message);
@@ -191,10 +185,6 @@ public class ProtobufHttpMessageConverter extends AbstractHttpMessageConverter<M
}
}
private Charset getCharset(MediaType contentType) {
return contentType.getCharSet() != null ? contentType.getCharSet() : DEFAULT_CHARSET;
}
/**
* Set the "X-Protobuf-*" HTTP headers when responding with a message of
* content type "application/x-protobuf"
@@ -206,9 +196,18 @@ public class ProtobufHttpMessageConverter extends AbstractHttpMessageConverter<M
response.getHeaders().set(X_PROTOBUF_MESSAGE_HEADER, message.getDescriptorForType().getFullName());
}
@Override
protected MediaType getDefaultContentType(Message message) {
return PROTOBUF;
/**
* Create a new {@code Message.Builder} instance for the given class.
* <p>This method uses a ConcurrentHashMap for caching method lookups.
*/
private static Message.Builder getMessageBuilder(Class<? extends Message> clazz) throws Exception {
Method method = methodCache.get(clazz);
if (method == null) {
method = clazz.getMethod("newBuilder");
methodCache.put(clazz, method);
}
return (Message.Builder) method.invoke(clazz);
}
}