org.wso2.andes.configuration.qpid.plugins.SlowConsumerDetectionQueueConfiguration.java Source code

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Here is the source code for org.wso2.andes.configuration.qpid.plugins.SlowConsumerDetectionQueueConfiguration.java

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/*
 * Copyright (c) 2005-2014, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 * WSO2 Inc. 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.wso2.andes.configuration.qpid.plugins;

import org.apache.commons.configuration.Configuration;
import org.apache.commons.configuration.ConfigurationException;
import org.wso2.andes.server.plugins.PluginManager;
import org.wso2.andes.server.registry.ApplicationRegistry;
import org.wso2.andes.policies.SlowConsumerPolicyPlugin;
import org.wso2.andes.policies.SlowConsumerPolicyPluginFactory;

import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

public class SlowConsumerDetectionQueueConfiguration extends ConfigurationPlugin {
    private SlowConsumerPolicyPlugin _policyPlugin;

    public static class SlowConsumerDetectionQueueConfigurationFactory implements ConfigurationPluginFactory {
        public ConfigurationPlugin newInstance(String path, Configuration config) throws ConfigurationException {
            SlowConsumerDetectionQueueConfiguration slowConsumerConfig = new SlowConsumerDetectionQueueConfiguration();
            slowConsumerConfig.setConfiguration(path, config);
            return slowConsumerConfig;
        }

        public List<String> getParentPaths() {
            return Arrays.asList("virtualhosts.virtualhost.queues.slow-consumer-detection",
                    "virtualhosts.virtualhost.queues.queue.slow-consumer-detection",
                    "virtualhosts.virtualhost.topics.slow-consumer-detection",
                    "virtualhosts.virtualhost.topics.topic.slow-consumer-detection");
        }
    }

    public String[] getElementsProcessed() {
        return new String[] { "messageAge", "depth", "messageCount" };
    }

    public long getMessageAge() {
        return getLongValue("messageAge");
    }

    public long getDepth() {
        return getLongValue("depth");
    }

    public long getMessageCount() {
        return getLongValue("messageCount");
    }

    public SlowConsumerPolicyPlugin getPolicy() {
        return _policyPlugin;
    }

    @Override
    public void validateConfiguration() throws ConfigurationException {
        if (!containsPositiveLong("messageAge") && !containsPositiveLong("depth")
                && !containsPositiveLong("messageCount")) {
            throw new ConfigurationException("At least one configuration property"
                    + "('messageAge','depth' or 'messageCount') must be specified.");
        }

        SlowConsumerDetectionPolicyConfiguration policyConfig = getConfiguration(
                SlowConsumerDetectionPolicyConfiguration.class.getName());

        PluginManager pluginManager = ApplicationRegistry.getInstance().getPluginManager();
        Map<String, SlowConsumerPolicyPluginFactory> factories = pluginManager.getSlowConsumerPlugins();

        if (policyConfig == null) {
            throw new ConfigurationException(
                    "No Slow Consumer Policy specified. Known Policies:" + factories.keySet());
        }

        if (_logger.isDebugEnabled()) {
            Iterator<?> keys = policyConfig.getConfig().getKeys();

            while (keys.hasNext()) {
                String key = (String) keys.next();

                _logger.debug("Policy Keys:" + key);
            }

        }

        SlowConsumerPolicyPluginFactory<SlowConsumerPolicyPlugin> pluginFactory = factories
                .get(policyConfig.getPolicyName().toLowerCase());

        if (pluginFactory == null) {
            throw new ConfigurationException("Unknown Slow Consumer Policy specified:"
                    + policyConfig.getPolicyName() + " Known Policies:" + factories.keySet());
        }

        _policyPlugin = pluginFactory.newInstance(policyConfig);

        // Debug the creation of this Config
        _logger.debug(this);
    }

    public String formatToString() {
        StringBuilder sb = new StringBuilder();
        if (getMessageAge() > 0) {
            sb.append("Age:").append(getMessageAge()).append(":");
        }
        if (getDepth() > 0) {
            sb.append("Depth:").append(getDepth()).append(":");
        }
        if (getMessageCount() > 0) {
            sb.append("Count:").append(getMessageCount()).append(":");
        }

        sb.append("Policy[").append(getPolicy()).append("]");
        return sb.toString();
    }
}