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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.server.configuration.plugins;
import org.apache.commons.configuration.Configuration;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.qpid.server.plugins.PluginManager;
import org.apache.qpid.server.registry.ApplicationRegistry;
import org.apache.qpid.slowconsumerdetection.policies.SlowConsumerPolicyPlugin;
import org.apache.qpid.slowconsumerdetection.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
{
PluginManager pluginManager;
try
{
pluginManager = ApplicationRegistry.getInstance().getPluginManager();
}
catch (IllegalStateException ise)
{
// We see this happen during shutdown due to asynchronous reconfig performed IO threads
// running at the same time as the shutdown handler.
_policyPlugin = null;
return;
}
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());
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();
}
}
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