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/*
*
* 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.qpid.management.example;
import java.io.IOException;
import java.net.URI;
import org.apache.muse.ws.addressing.EndpointReference;
/**
* Common interface for all QMan related examples.
*
* @author Andrea Gazzarini
*/
public abstract class AbstractQManExample
{
final static String LINE_SEPARATOR = System.getProperty("line.separator","\n");
protected final static String PREFIX = "qman";
/**
* Prints out the expected command line of this sample and after that exits.
*/
static void printUsageAndExit(String reason)
{
StringBuilder builder = new StringBuilder();
builder.append("WARNING! Unable to run this sample : ")
.append(reason)
.append(LINE_SEPARATOR)
.append("-------------------------------------------------------------")
.append(LINE_SEPARATOR)
.append("Expected command line args for this sample are :")
.append(LINE_SEPARATOR)
.append(LINE_SEPARATOR)
.append("1) host : ip or host name where QMan is running.")
.append(LINE_SEPARATOR)
.append("2) port : port number where QMan is running.")
.append(LINE_SEPARATOR)
.append("------------------------------------------------------------");
System.out.println(builder);
System.exit(1);
}
/**
* Prints out a description of this example.
*/
abstract void printOutExampleDescription();
/**
* Executes this example.
* Note that this is just a template method used to avoid code duplication
* (printOutExampleDescription() line) so in order to see how the example
* works you should have a look at the concrete implementation of
* executeExample(String host, int port).
*
* @param host the host where QMan is running.
* @param port the port where QMan is running.
*/
void execute(String [] arguments)
{
if (arguments.length != 2){
printUsageAndExit("invalid command line was given.");
}
try
{
// 1) Parses command line arguments...
String host = arguments[0];
int port = Integer.parseInt(arguments[1]);
printOutExampleDescription();
waitForUserInput("Type enter to proceed...");
executeExample(host, port);
} catch(NumberFormatException exception)
{
printUsageAndExit("port number must be a number.");
} catch(Exception exception)
{
System.out.println("-----------------------EXAMPLE FAILURE-----------");
System.out.println("Not well-defined exception was detected while");
System.out.println("running the example.");
exception.printStackTrace(System.out);
System.out.println("--------------------------------------------------------");
}
}
protected void waitForUserInput(String message) throws IOException {
System.out.println(message);
System.in.read();
}
/**
* Each concrete implementor must define here how the example works.
* So, on top of that, user who wants to see how to use a specific feature
* should have a look at the concrete implementation of this method..
*
* @param host the host where QMan is running.
* @param port the port where QMan is running.
* @throws Exception when the example fails (not at application level).
*/
void executeExample(String host, int port) throws Exception{};
/**
* Returns the endpoint reference of the adapter service.
*
* @param host ip or host name where the service is running.
* @param port the port number of the server where the service is running.
* @return the endpoint reference of the adapter service.
*/
EndpointReference getAdapterEndpointReference(String host, int port)
{
URI address = URI.create(
"http://"+
host+
":"+
port+
"/qman/services/adapter");
return new EndpointReference(address);
}
}
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