com.linecorp.armeria.common

Class HttpResponseDuplicator

java.lang.Object

com.linecorp.armeria.common.stream.AbstractStreamMessageDuplicator<HttpObject,HttpResponse>

com.linecorp.armeria.common.HttpResponseDuplicator

All Implemented Interfaces:

SafeCloseable, AutoCloseable

public class HttpResponseDuplicator
extends AbstractStreamMessageDuplicator<HttpObject,HttpResponse>

Allows subscribing to an HttpResponse multiple times by duplicating the stream.

 > final HttpResponse originalRes = ...
 > final HttpResponseDuplicator resDuplicator = new HttpResponseDuplicator(originalRes);
 >
 > final HttpResponse dupRes1 = resDuplicator.duplicateStream();
 > final HttpResponse dupRes2 = resDuplicator.duplicateStream(true); // the last stream
 >
 > dupRes1.subscribe(new FooHeaderSubscriber() {
 >     @Override
 >     public void onNext(Object o) {
 >     ...
 >     // Do something according to the header's status.
 >     }
 > });
 >
 > dupRes2.aggregate().handle((aRes, cause) -> {
 >     // Do something with the message.
 > });
 

Constructor Summary

Constructors

Constructor and Description
HttpResponseDuplicator(HttpResponse res) Creates a new instance wrapping an HttpResponse and publishing to multiple subscribers.
HttpResponseDuplicator(HttpResponse res, long maxSignalLength) Creates a new instance wrapping an HttpResponse and publishing to multiple subscribers.
HttpResponseDuplicator(HttpResponse res, long maxSignalLength, io.netty.util.concurrent.EventExecutor executor) Creates a new instance wrapping an HttpResponse and publishing to multiple subscribers.

Method Summary

Modifier and Type	Method and Description
HttpResponse	duplicateStream() Creates a new StreamMessage that duplicates the upstream StreamMessage specified when creating this duplicator.
HttpResponse	duplicateStream(boolean lastStream) Creates a new StreamMessage that duplicates the upstream StreamMessage specified when creating this duplicator.

Methods inherited from class com.linecorp.armeria.common.stream.AbstractStreamMessageDuplicator

abort, abort, close, duplicatorExecutor

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

HttpResponseDuplicator

public HttpResponseDuplicator(HttpResponse res)

Creates a new instance wrapping an HttpResponse and publishing to multiple subscribers. The length of response is limited by default with the client-side parameter which is Flags.defaultMaxResponseLength(). If you are at server-side, you need to use HttpResponseDuplicator(HttpResponse, long) and the long value should be greater than the length of response or 0 which disables the limit.

Parameters:

res - the response that will publish data to subscribers

HttpResponseDuplicator

public HttpResponseDuplicator(HttpResponse res,
                              long maxSignalLength)

Creates a new instance wrapping an HttpResponse and publishing to multiple subscribers.

Parameters:

res - the response that will publish data to subscribers

maxSignalLength - the maximum length of signals. 0 disables the length limit

HttpResponseDuplicator

public HttpResponseDuplicator(HttpResponse res,
                              long maxSignalLength,
                              @Nullable
                              io.netty.util.concurrent.EventExecutor executor)

Creates a new instance wrapping an HttpResponse and publishing to multiple subscribers.

Parameters:

res - the response that will publish data to subscribers

maxSignalLength - the maximum length of signals. 0 disables the length limit

executor - the executor to use for upstream signals.

Method Detail

duplicateStream

public HttpResponse duplicateStream()

Description copied from class: AbstractStreamMessageDuplicator

Creates a new StreamMessage that duplicates the upstream StreamMessage specified when creating this duplicator.

Overrides:

duplicateStream in class AbstractStreamMessageDuplicator<HttpObject,HttpResponse>

duplicateStream

public HttpResponse duplicateStream(boolean lastStream)

Description copied from class: AbstractStreamMessageDuplicator

Creates a new StreamMessage that duplicates the upstream StreamMessage specified when creating this duplicator.

Overrides:

duplicateStream in class AbstractStreamMessageDuplicator<HttpObject,HttpResponse>

Parameters:

lastStream - whether to prevent further duplication