/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.activemq.transport.stomp;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.HashMap;
public class StompConnection {
public static final long RECEIVE_TIMEOUT = 10000;
private Socket stompSocket;
private ByteArrayOutputStream inputBuffer = new ByteArrayOutputStream();
private String version = Stomp.DEFAULT_VERSION;
public void open(String host, int port) throws IOException, UnknownHostException {
open(new Socket(host, port));
}
public void open(Socket socket) {
stompSocket = socket;
}
public void close() throws IOException {
if (stompSocket != null) {
stompSocket.close();
stompSocket = null;
}
}
public void sendFrame(String data) throws Exception {
byte[] bytes = data.getBytes("UTF-8");
OutputStream outputStream = stompSocket.getOutputStream();
outputStream.write(bytes);
outputStream.flush();
}
public void sendFrame(String frame, byte[] data) throws Exception {
byte[] bytes = frame.getBytes("UTF-8");
OutputStream outputStream = stompSocket.getOutputStream();
outputStream.write(bytes);
outputStream.write(data);
outputStream.flush();
}
public StompFrame receive() throws Exception {
return receive(RECEIVE_TIMEOUT);
}
public StompFrame receive(long timeOut) throws Exception {
stompSocket.setSoTimeout((int)timeOut);
InputStream is = stompSocket.getInputStream();
StompWireFormat wf = new StompWireFormat();
wf.setStompVersion(version);
DataInputStream dis = new DataInputStream(is);
return (StompFrame)wf.unmarshal(dis);
}
public String receiveFrame() throws Exception {
return receiveFrame(RECEIVE_TIMEOUT);
}
public String receiveFrame(long timeOut) throws Exception {
stompSocket.setSoTimeout((int)timeOut);
InputStream is = stompSocket.getInputStream();
int c = 0;
for (;;) {
c = is.read();
if (c < 0) {
throw new IOException("socket closed.");
} else if (c == 0) {
c = is.read();
if (c == '\n') {
// end of frame
return stringFromBuffer(inputBuffer);
} else {
inputBuffer.write(0);
inputBuffer.write(c);
}
} else {
inputBuffer.write(c);
}
}
}
private String stringFromBuffer(ByteArrayOutputStream inputBuffer) throws Exception {
byte[] ba = inputBuffer.toByteArray();
inputBuffer.reset();
return new String(ba, "UTF-8");
}
public Socket getStompSocket() {
return stompSocket;
}
public void setStompSocket(Socket stompSocket) {
this.stompSocket = stompSocket;
}
public void connect(String username, String password) throws Exception {
connect(username, password, null);
}
public void connect(String username, String password, String client) throws Exception {
HashMap<String, String> headers = new HashMap<String, String>();
headers.put("login", username);
headers.put("passcode", password);
if (client != null) {
headers.put("client-id", client);
}
connect(headers);
}
public void connect(HashMap<String, String> headers) throws Exception {
StompFrame frame = new StompFrame("CONNECT", headers);
sendFrame(frame.format());
StompFrame connect = receive();
if (!connect.getAction().equals(Stomp.Responses.CONNECTED)) {
throw new Exception ("Not connected: " + connect.getBody());
}
}
public void disconnect() throws Exception {
disconnect(null);
}
public void disconnect(String receiptId) throws Exception {
StompFrame frame = new StompFrame("DISCONNECT");
if (receiptId != null && !receiptId.isEmpty()) {
frame.getHeaders().put(Stomp.Headers.RECEIPT_REQUESTED, receiptId);
}
sendFrame(frame.format());
}
public void send(String destination, String message) throws Exception {
send(destination, message, null, null);
}
public void send(String destination, String message, String transaction, HashMap<String, String> headers) throws Exception {
if (headers == null) {
headers = new HashMap<String, String>();
}
headers.put("destination", destination);
if (transaction != null) {
headers.put("transaction", transaction);
}
StompFrame frame = new StompFrame("SEND", headers, message.getBytes());
sendFrame(frame.format());
}
public void subscribe(String destination) throws Exception {
subscribe(destination, null, null);
}
public void subscribe(String destination, String ack) throws Exception {
subscribe(destination, ack, new HashMap<String, String>());
}
public void subscribe(String destination, String ack, HashMap<String, String> headers) throws Exception {
if (headers == null) {
headers = new HashMap<String, String>();
}
headers.put("destination", destination);
if (ack != null) {
headers.put("ack", ack);
}
StompFrame frame = new StompFrame("SUBSCRIBE", headers);
sendFrame(frame.format());
}
public void unsubscribe(String destination) throws Exception {
unsubscribe(destination, null);
}
public void unsubscribe(String destination, HashMap<String, String> headers) throws Exception {
if (headers == null) {
headers = new HashMap<String, String>();
}
headers.put("destination", destination);
StompFrame frame = new StompFrame("UNSUBSCRIBE", headers);
sendFrame(frame.format());
}
public void begin(String transaction) throws Exception {
HashMap<String, String> headers = new HashMap<String, String>();
headers.put("transaction", transaction);
StompFrame frame = new StompFrame("BEGIN", headers);
sendFrame(frame.format());
}
public void abort(String transaction) throws Exception {
HashMap<String, String> headers = new HashMap<String, String>();
headers.put("transaction", transaction);
StompFrame frame = new StompFrame("ABORT", headers);
sendFrame(frame.format());
}
public void commit(String transaction) throws Exception {
HashMap<String, String> headers = new HashMap<String, String>();
headers.put("transaction", transaction);
StompFrame frame = new StompFrame("COMMIT", headers);
sendFrame(frame.format());
}
public void ack(StompFrame frame) throws Exception {
ack(frame.getHeaders().get("message-id"), null);
}
public void ack(StompFrame frame, String transaction) throws Exception {
ack(frame.getHeaders().get("message-id"), transaction);
}
public void ack(String messageId) throws Exception {
ack(messageId, null);
}
public void ack(String messageId, String transaction) throws Exception {
HashMap<String, String> headers = new HashMap<String, String>();
headers.put("message-id", messageId);
if (transaction != null)
headers.put("transaction", transaction);
StompFrame frame = new StompFrame("ACK", headers);
sendFrame(frame.format());
}
public void keepAlive() throws Exception {
OutputStream outputStream = stompSocket.getOutputStream();
outputStream.write('\n');
outputStream.flush();
}
protected String appendHeaders(HashMap<String, Object> headers) {
StringBuilder result = new StringBuilder();
for (String key : headers.keySet()) {
result.append(key + ":" + headers.get(key) + "\n");
}
result.append("\n");
return result.toString();
}
public String getVersion() {
return version;
}
public void setVersion(String version) {
this.version = version;
}
}