ActiveMQ example source code file (ActiveMQCommand.java)

This example ActiveMQ source code file (ActiveMQCommand.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - ActiveMQ tags/keywords

action, activemqactionpreparator, argument, blueprintcontaineraware, exception, field, field, illegalargumentexception, list, list, object, object, override, override, reflection, util

The ActiveMQ ActiveMQCommand.java source code

/**
 *
 * 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.karaf.commands;

import java.lang.reflect.Field;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.apache.felix.gogo.commands.Action;
import org.apache.felix.gogo.commands.Argument;
import org.apache.felix.gogo.commands.basic.AbstractCommand;
import org.apache.felix.gogo.commands.basic.ActionPreparator;
import org.apache.felix.gogo.commands.basic.DefaultActionPreparator;
import org.apache.felix.service.command.CommandSession;
import org.apache.karaf.shell.console.BlueprintContainerAware;
import org.apache.karaf.shell.console.BundleContextAware;
import org.apache.karaf.shell.console.CompletableFunction;
import org.apache.karaf.shell.console.Completer;
import org.apache.karaf.shell.console.commands.GenericType;
import org.osgi.framework.BundleContext;
import org.osgi.service.blueprint.container.BlueprintContainer;
import org.osgi.service.blueprint.container.Converter;

/**
 * Base command to process options and wrap native ActiveMQ console commands.
 */
public class ActiveMQCommand extends AbstractCommand implements CompletableFunction
{
    protected BlueprintContainer blueprintContainer;
    protected Converter blueprintConverter;
    protected String actionId;
    protected List<Completer> completers;

    public void setBlueprintContainer(BlueprintContainer blueprintContainer) {
        this.blueprintContainer = blueprintContainer;
    }

    public void setBlueprintConverter(Converter blueprintConverter) {
        this.blueprintConverter = blueprintConverter;
    }

    public void setActionId(String actionId) {
        this.actionId = actionId;
    }

    @Override
    public List<Completer> getCompleters() {
        return completers;
    }

    public void setCompleters(List<Completer> completers) {
        this.completers = completers;
    }

    @Override
    protected ActionPreparator getPreparator() throws Exception {
        return new ActiveMQActionPreparator();
    }

    class ActiveMQActionPreparator extends DefaultActionPreparator {
        @Override
        public boolean prepare(Action action, CommandSession session, List<Object> params) throws Exception
        {
            Map<Argument, Field> arguments = new HashMap();
            List<Argument> orderedArguments = new ArrayList();
            // Introspect
            for (Class type = action.getClass(); type != null; type = type.getSuperclass()) {
                for (Field field : type.getDeclaredFields()) {
                    Argument argument = field.getAnnotation(Argument.class);
                    if (argument != null) {
                        arguments.put(argument, field);
                        int index = argument.index();
                        while (orderedArguments.size() <= index) {
                            orderedArguments.add(null);
                        }
                        if (orderedArguments.get(index) != null) {
                            throw new IllegalArgumentException("Duplicate argument index: " + index);
                        }
                        orderedArguments.set(index, argument);
                    }
                }
            }
            // Check indexes are correct
            for (int i = 0; i < orderedArguments.size(); i++) {
                if (orderedArguments.get(i) == null) {
                    throw new IllegalArgumentException("Missing argument for index: " + i);
                }
            }
            // Populate
            Map<Argument, Object> argumentValues = new HashMap();
            int argIndex = 0;
            for (Iterator<Object> it = params.iterator(); it.hasNext();) {
                Object param = it.next();
                if (argIndex >= orderedArguments.size()) {
                    throw new IllegalArgumentException("Too many arguments specified");
                }
                Argument argument = orderedArguments.get(argIndex);
                if (!argument.multiValued()) {
                    argIndex++;
                }
                if (argument.multiValued()) {
                    List<Object> l = (List