io.grpc.okhttp.AsyncFrameWriter Maven / Gradle / Ivy
/*
* Copyright 2014, gRPC Authors All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.grpc.okhttp;
import com.google.common.base.Preconditions;
import io.grpc.internal.SerializingExecutor;
import io.grpc.okhttp.internal.framed.ErrorCode;
import io.grpc.okhttp.internal.framed.FrameWriter;
import io.grpc.okhttp.internal.framed.Header;
import io.grpc.okhttp.internal.framed.Settings;
import java.io.IOException;
import java.net.Socket;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import okio.Buffer;
class AsyncFrameWriter implements FrameWriter {
private static final Logger log = Logger.getLogger(OkHttpClientTransport.class.getName());
private FrameWriter frameWriter;
private Socket socket;
// Although writes are thread-safe, we serialize them to prevent consuming many Threads that are
// just waiting on each other.
private final SerializingExecutor executor;
private final OkHttpClientTransport transport;
public AsyncFrameWriter(OkHttpClientTransport transport, SerializingExecutor executor) {
this.transport = transport;
this.executor = executor;
}
/**
* Set the real frameWriter and the corresponding underlying socket, the socket is needed for
* closing.
*
* should only be called by thread of executor.
*/
void becomeConnected(FrameWriter frameWriter, Socket socket) {
Preconditions.checkState(this.frameWriter == null,
"AsyncFrameWriter's setFrameWriter() should only be called once.");
this.frameWriter = Preconditions.checkNotNull(frameWriter, "frameWriter");
this.socket = Preconditions.checkNotNull(socket, "socket");
}
@Override
public void connectionPreface() {
executor.execute(new WriteRunnable() {
@Override
public void doRun() throws IOException {
frameWriter.connectionPreface();
}
});
}
@Override
public void ackSettings(final Settings peerSettings) {
executor.execute(new WriteRunnable() {
@Override
public void doRun() throws IOException {
frameWriter.ackSettings(peerSettings);
}
});
}
@Override
public void pushPromise(final int streamId, final int promisedStreamId,
final List requestHeaders) {
executor.execute(new WriteRunnable() {
@Override
public void doRun() throws IOException {
frameWriter.pushPromise(streamId, promisedStreamId, requestHeaders);
}
});
}
@Override
public void flush() {
executor.execute(new WriteRunnable() {
@Override
public void doRun() throws IOException {
frameWriter.flush();
}
});
}
@Override
public void synStream(final boolean outFinished, final boolean inFinished, final int streamId,
final int associatedStreamId, final List headerBlock) {
executor.execute(new WriteRunnable() {
@Override
public void doRun() throws IOException {
frameWriter.synStream(outFinished, inFinished, streamId, associatedStreamId, headerBlock);
}
});
}
@Override
public void synReply(final boolean outFinished, final int streamId,
final List headerBlock) {
executor.execute(new WriteRunnable() {
@Override
public void doRun() throws IOException {
frameWriter.synReply(outFinished, streamId, headerBlock);
}
});
}
@Override
public void headers(final int streamId, final List headerBlock) {
executor.execute(new WriteRunnable() {
@Override
public void doRun() throws IOException {
frameWriter.headers(streamId, headerBlock);
}
});
}
@Override
public void rstStream(final int streamId, final ErrorCode errorCode) {
executor.execute(new WriteRunnable() {
@Override
public void doRun() throws IOException {
frameWriter.rstStream(streamId, errorCode);
}
});
}
@Override
public void data(final boolean outFinished, final int streamId, final Buffer source,
final int byteCount) {
executor.execute(new WriteRunnable() {
@Override
public void doRun() throws IOException {
frameWriter.data(outFinished, streamId, source, byteCount);
}
});
}
@Override
public void settings(final Settings okHttpSettings) {
executor.execute(new WriteRunnable() {
@Override
public void doRun() throws IOException {
frameWriter.settings(okHttpSettings);
}
});
}
@Override
public void ping(final boolean ack, final int payload1, final int payload2) {
executor.execute(new WriteRunnable() {
@Override
public void doRun() throws IOException {
frameWriter.ping(ack, payload1, payload2);
}
});
}
@Override
public void goAway(final int lastGoodStreamId, final ErrorCode errorCode,
final byte[] debugData) {
executor.execute(new WriteRunnable() {
@Override
public void doRun() throws IOException {
frameWriter.goAway(lastGoodStreamId, errorCode, debugData);
// Flush it since after goAway, we are likely to close this writer.
frameWriter.flush();
}
});
}
@Override
public void windowUpdate(final int streamId, final long windowSizeIncrement) {
executor.execute(new WriteRunnable() {
@Override
public void doRun() throws IOException {
frameWriter.windowUpdate(streamId, windowSizeIncrement);
}
});
}
@Override
public void close() {
executor.execute(new Runnable() {
@Override
public void run() {
if (frameWriter != null) {
try {
frameWriter.close();
socket.close();
} catch (IOException e) {
log.log(Level.WARNING, "Failed closing connection", e);
}
}
}
});
}
private abstract class WriteRunnable implements Runnable {
@Override
public final void run() {
try {
if (frameWriter == null) {
throw new IOException("Unable to perform write due to unavailable frameWriter.");
}
doRun();
} catch (RuntimeException e) {
transport.onException(e);
} catch (Exception e) {
transport.onException(e);
}
}
public abstract void doRun() throws IOException;
}
@Override
public int maxDataLength() {
return frameWriter == null ? 0x4000 /* 16384, the minimum required by the HTTP/2 spec */
: frameWriter.maxDataLength();
}
}