org.wildfly.httpclient.ejb.RemoteHTTPHandler Maven / Gradle / Ivy
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* Copyright 2017 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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 org.wildfly.httpclient.ejb;
import java.io.IOException;
import java.util.concurrent.ExecutorService;
import javax.transaction.xa.Xid;
import org.jboss.marshalling.Unmarshaller;
import org.wildfly.transaction.client.SimpleXid;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import io.undertow.util.AttachmentKey;
/**
* Undertow HTTP handler that is responsible for initial parsing of EJB over HTTP messages
*
* @author Stuart Douglas
*/
public abstract class RemoteHTTPHandler implements HttpHandler {
private final ExecutorService executorService;
private static final AttachmentKey EXECUTOR = AttachmentKey.create(ExecutorService.class);
public RemoteHTTPHandler(ExecutorService executorService) {
this.executorService = executorService;
}
@Override
public final void handleRequest(HttpServerExchange exchange) throws Exception {
if (exchange.isInIoThread()) {
if (executorService == null) {
exchange.dispatch(this);
} else {
exchange.putAttachment(EXECUTOR, executorService);
exchange.dispatch(executorService, this);
}
return;
} else if (executorService != null && exchange.getAttachment(EXECUTOR) == null) {
exchange.putAttachment(EXECUTOR, executorService);
exchange.dispatch(executorService, this);
return;
}
exchange.startBlocking();
handleInternal(exchange);
}
protected abstract void handleInternal(HttpServerExchange exchange) throws Exception;
protected ReceivedTransaction readTransaction(Unmarshaller unmarshaller) throws IOException {
int type = unmarshaller.readByte();
if (type == 0) {
return null;
} else if (type == 1 || type == 2) {
int formatId = unmarshaller.readInt();
int len = unmarshaller.readInt();
byte[] globalId = new byte[len];
unmarshaller.readFully(globalId);
len = unmarshaller.readInt();
byte[] branchId = new byte[len];
unmarshaller.readFully(branchId);
SimpleXid simpleXid = new SimpleXid(formatId, globalId, branchId);
if (type == 2) {
return new ReceivedTransaction(simpleXid, unmarshaller.readInt(), true);
}
return new ReceivedTransaction(simpleXid, 0, false);
} else {
throw EjbHttpClientMessages.MESSAGES.invalidTransactionType(type);
}
}
static class ReceivedTransaction {
final Xid xid;
final int remainingTime;
final boolean outflowed;
ReceivedTransaction(Xid xid, int remainingTime, boolean outflowed) {
this.xid = xid;
this.remainingTime = remainingTime;
this.outflowed = outflowed;
}
public Xid getXid() {
return xid;
}
public int getRemainingTime() {
return remainingTime;
}
public boolean isOutflowed() {
return outflowed;
}
}
}