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Implement abillity to handle Http-Requests asyncrounously

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Lukas Rieger (Blue) 2023-03-06 20:38:38 +01:00
parent 22ed75c513
commit 1be7dd5746
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3 changed files with 43 additions and 9 deletions
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36
BlueMapCommon/src/main/java/de/bluecolored/bluemap/common/web/http/HttpConnection.java
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@ -6,18 +6,28 @@
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.nio.channels.Channel;
import java.nio.channels.SelectableChannel;
import java.nio.channels.SelectionKey;
import java.nio.channels.SocketChannel;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.Executor;
public class HttpConnection implements SelectionConsumer {
private final HttpRequestHandler requestHandler;
private final Executor responseHandlerExecutor;
private HttpRequest request;
private CompletableFuture<HttpResponse> futureResponse;
private HttpResponse response;
public HttpConnection(HttpRequestHandler requestHandler) {
this(requestHandler, Runnable::run); //run synchronously
}
public HttpConnection(HttpRequestHandler requestHandler, Executor responseHandlerExecutor) {
this.requestHandler = requestHandler;
this.responseHandlerExecutor = responseHandlerExecutor;
}
@Override
@ -48,10 +58,22 @@ public void accept(SelectionKey selectionKey) {
}
// process request
if (response == null) {
this.response = requestHandler.handle(request);
if (futureResponse == null) {
futureResponse = CompletableFuture.supplyAsync(
() -> requestHandler.handle(request),
responseHandlerExecutor
);
futureResponse.thenAccept(response -> {
try {
response.read(channel); // do an initial read to trigger response sending intent
this.response = response;
} catch (IOException e) {
handleIOException(channel, e);
}
});
}
if (response == null) return;
if (!selectionKey.isValid()) return;
// send response
@ -63,10 +85,19 @@ public void accept(SelectionKey selectionKey) {
// reset to accept new request
request.clear();
response.close();
futureResponse = null;
response = null;
selectionKey.interestOps(SelectionKey.OP_READ);
} catch (IOException e) {
handleIOException(channel, e);
}
}
private void handleIOException(Channel channel, IOException e) {
request.clear();
response = null;
Logger.global.logDebug("Failed to process selection: " + e);
try {
channel.close();
@ -74,6 +105,5 @@ public void accept(SelectionKey selectionKey) {
Logger.global.logWarning("Failed to close channel" + e2);
}
}
}
}

2
BlueMapCommon/src/main/java/de/bluecolored/bluemap/common/web/http/HttpResponse.java
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@ -57,7 +57,7 @@ public HttpResponse(HttpStatusCode statusCode) {
this.headers = new HashMap<>();
}
public boolean read(WritableByteChannel channel) throws IOException {
public synchronized boolean read(WritableByteChannel channel) throws IOException {
if (complete) return true;
// send headers

4
BlueMapCommon/src/main/java/de/bluecolored/bluemap/common/web/http/HttpServer.java
View File

@ -13,6 +13,10 @@ public HttpServer(HttpRequestHandler requestHandler) throws IOException {
@Override
public SelectionConsumer createConnectionHandler() {
return new HttpConnection(requestHandler);
// Enable async request handling ...
// TODO: maybe find a better/separate executor than using bluemap's common thread-pool
//return new HttpConnection(requestHandler, BlueMap.THREAD_POOL);
}
}