@Override
public boolean next(LongWritable key, ProtobufWritable<M> value) throws IOException {
if (pos_ > end_ || fileIn_.available() <= 0) {
return false;
}
key.set(pos_);
if (Protobufs.KNOWN_GOOD_POSITION_MARKER.length + pos_ <= end_)
fileIn_.skipBytes(Protobufs.KNOWN_GOOD_POSITION_MARKER.length);
pos_ = fileIn_.getPos();
try {
if (protoBuilder == null) {
protoBuilder = Protobufs.getMessageBuilder(typeRef_.getRawClass());
}
Message.Builder builder = protoBuilder.clone();
final boolean success = builder.mergeDelimitedFrom(fileIn_);
if (success) {
value.set((M) builder.build());
}
return success;
} catch (InvalidProtocolBufferException e) {
LOG.error(
"Invalid Protobuf exception while building " + typeRef_.getRawClass().getName(), e);
} catch (UninitializedMessageException ume) {
LOG.error(
"Uninitialized Message Exception while building " + typeRef_.getRawClass().getName(),
ume);
}
return false;
}
/** Get request protobuf for the RPC method. */
private Message getRequestProto(SocketRpcProtos.Request rpcRequest, Message requestPrototype)
throws RpcException {
Message.Builder builder;
try {
builder = requestPrototype.newBuilderForType().mergeFrom(rpcRequest.getRequestProto());
if (!builder.isInitialized()) {
throw new RpcException(ErrorReason.BAD_REQUEST_PROTO, "Invalid request proto", null);
}
} catch (InvalidProtocolBufferException e) {
throw new RpcException(ErrorReason.BAD_REQUEST_PROTO, "Invalid request proto", e);
}
return builder.build();
}
/**
* Decodes protobuf messages of given type from buffer. If not enough data has been presented
* delegates to the {@link CumulativeProtocolDecoder} base class to read more data from the wire.
*
* <p>It uses instance of internal {@link SizeContext} class to calculate size of buffer expected
* by the given type of message. The size of every message that arrives on the wire is specified
* by the prepending varint value.
*
* @param session The session used to store internal {@link SizeContext}.
* @param in The buffer used to read messages if contains enough data.
* @param out The output for messages decoded from data provided.
* @see ProtobufEncoder
* @see SizeContext
*/
@Override
protected boolean doDecode(IoSession session, IoBuffer in, ProtocolDecoderOutput out)
throws Exception {
SizeContext ctx = SizeContext.get(session, in);
if (ctx.hasEnoughData(in)) {
try {
Message.Builder builder = prototype.newBuilderForType();
ctx.getInputStream(in).readMessage(builder, extentions);
out.write(builder.build());
return true;
} finally {
ctx.shiftPositionAndReset(session, in);
}
}
return false;
}
@Nullable
private static <M extends Message> M filterFrom(
M msg, boolean clearEmpty, Predicate<FieldDescriptor> filter, int firstDiscarded) {
// At least one field was discarded; we have to work harder and maybe create
// a new message that will contain only the retained filters. Use a lazy-allocated
// builder to also optimize the scenario of all fields being discarded.
Message.Builder builder = (firstDiscarded == 0) ? null : msg.newBuilderForType();
Iterator<Map.Entry<FieldDescriptor, Object>> iter = msg.getAllFields().entrySet().iterator();
for (int i = 0; i < firstDiscarded; ++i) {
filterValue(clearEmpty, filter, builder, iter.next());
}
iter.next(); // Ignore object at firstDiscarded position
while (iter.hasNext()) {
Map.Entry<FieldDescriptor, Object> entry = iter.next();
if (filter.test(entry.getKey())) {
builder = (builder == null) ? msg.newBuilderForType() : builder;
filterValue(clearEmpty, filter, builder, entry);
}
}
if (builder == null) {
if (clearEmpty) {
return null;
} else {
@SuppressWarnings("unchecked")
M ret = (M) msg.getDefaultInstanceForType();
return ret;
}
} else {
@SuppressWarnings("unchecked")
M ret = (M) builder.build();
return ret;
}
}
public static Message addField(Message m, String name, Object value) {
Message.Builder builder = m.toBuilder();
setFieldByName(builder, name, value);
return builder.build();
}
public static Message instantiateFromClassName(String canonicalClassName) {
Class<? extends Message> protoClass = getInnerProtobufClass(canonicalClassName);
Message.Builder builder = getMessageBuilder(protoClass);
return builder.build();
}