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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2016-2018 Ericsson. All rights reserved.
* Modifications Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.apex.tools.simple.wsclient;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.channels.NotYetConnectedException;
import org.apache.commons.lang3.Validate;
import org.java_websocket.client.WebSocketClient;
import org.java_websocket.framing.CloseFrame;
import org.java_websocket.handshake.ServerHandshake;
/**
* Simple WS client with a console for events.
*
* @author Sven van der Meer (sven.van.der.meer@ericsson.com)
*/
public class SimpleConsole extends WebSocketClient {
/** Application name, used as prompt. */
private final String appName;
// Output and error streams
private PrintStream outStream;
private PrintStream errStream;
/**
* Creates a new simple echo object.
*
* @param server the name of the server as either IP address or fully qualified host name, must not be blank
* @param port the port to be used, must not be blank
* @param appName the application name, used as prompt, must not be blank
* @param outStream the stream for message output
* @param errStream the stream for error messages
* @throws URISyntaxException is URI could not be created from server/port settings
* @throws RuntimeException if server or port where blank
*/
public SimpleConsole(final String server, final String port, final String appName, PrintStream outStream,
PrintStream errStream) throws URISyntaxException {
super(new URI("ws://" + server + ":" + port));
Validate.notBlank(appName, "SimpleConsole: given application name was blank");
this.appName = appName;
this.outStream = outStream;
this.errStream = errStream;
}
@Override
public void onClose(final int code, final String reason, final boolean remote) {
outStream.println(this.appName + ": Connection closed by " + (remote ? "APEX" : "me"));
outStream.print(" ==-->> ");
switch (code) {
case CloseFrame.NORMAL:
outStream.println("normal");
break;
case CloseFrame.GOING_AWAY:
outStream.println("APEX going away");
break;
case CloseFrame.PROTOCOL_ERROR:
outStream.println("some protocol error");
break;
case CloseFrame.REFUSE:
outStream.println("received unacceptable type of data");
break;
case CloseFrame.NO_UTF8:
outStream.println("expected UTF-8, found something else");
break;
case CloseFrame.TOOBIG:
outStream.println("message too big");
break;
case CloseFrame.UNEXPECTED_CONDITION:
outStream.println("unexpected server condition");
break;
default:
outStream.println("unkown close frame code");
break;
}
outStream.print(" ==-->> " + reason);
}
@Override
public void onError(final Exception ex) {
errStream.println(this.appName + ": " + ex.getMessage());
}
@Override
public void onMessage(final String message) {
// this client does not expect messages
}
@Override
public void onOpen(final ServerHandshake handshakedata) {
outStream.println(this.appName + ": opened connection to APEX (" + handshakedata.getHttpStatusMessage() + ")");
}
/**
* Runs the console client. In particular, it starts a new thread for the Websocket connection and then reads from
* standard input.
*
* @throws NotYetConnectedException if not connected to server when sending events
* @throws IOException on an IO problem on standard in
*/
public void runClient() throws IOException {
final Thread thread = new Thread() {
@Override
public void run() {
connect();
}
};
thread.setName("ClientThread");
thread.start();
final var in = new BufferedReader(new InputStreamReader(System.in));
var event = new StringBuilder();
String line;
while ((line = in.readLine()) != null) {
if ("exit".equals(line)) {
break;
}
final String current = line.trim();
if ("".equals(current)) {
this.send(event.toString());
event = new StringBuilder();
} else {
event.append(current);
}
}
thread.interrupt();
this.close(CloseFrame.NORMAL);
}
}
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