@Test
public void writeHeadersShouldSendHeaders() throws Exception {
Metadata headers = new Metadata();
stream().writeHeaders(headers);
verify(writeQueue)
.enqueue(
new SendResponseHeadersCommand(STREAM_ID, Utils.convertServerHeaders(headers), false),
true);
}
@Test
public void duplicateWriteHeadersShouldFail() throws Exception {
Metadata headers = new Metadata();
stream().writeHeaders(headers);
verify(writeQueue)
.enqueue(
new SendResponseHeadersCommand(STREAM_ID, Utils.convertServerHeaders(headers), false),
true);
try {
stream().writeHeaders(headers);
fail("Can only write response headers once");
} catch (IllegalStateException ise) {
// Success
}
}
@Override
public ClientStream newStream(
MethodDescriptor<?, ?> method, Metadata.Headers headers, ClientStreamListener listener) {
Preconditions.checkNotNull(method, "method");
Preconditions.checkNotNull(headers, "headers");
Preconditions.checkNotNull(listener, "listener");
// Create the stream.
final NettyClientStream stream = new NettyClientStream(listener, channel, handler);
// Convert the headers into Netty HTTP/2 headers.
AsciiString defaultPath = new AsciiString("/" + method.getFullMethodName());
Http2Headers http2Headers =
Utils.convertClientHeaders(headers, negotiationHandler.scheme(), defaultPath, authority);
ChannelFutureListener failureListener =
new ChannelFutureListener() {
@Override
public void operationComplete(ChannelFuture future) throws Exception {
if (!future.isSuccess()) {
// Stream creation failed. Close the stream if not already closed.
stream.transportReportStatus(
Status.fromThrowable(future.cause()), true, new Metadata());
}
}
};
// Write the command requesting the creation of the stream.
handler
.getWriteQueue()
.enqueue(
new CreateStreamCommand(http2Headers, stream),
!method.getType().clientSendsOneMessage())
.addListener(failureListener);
return stream;
}