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From steveblackmon <...@git.apache.org>
Subject [GitHub] incubator-streams pull request: Streams 211
Date Wed, 12 Nov 2014 05:15:33 GMT
Github user steveblackmon commented on a diff in the pull request:

    https://github.com/apache/incubator-streams/pull/125#discussion_r20201858
  
    --- Diff: streams-monitoring/src/main/java/org/apache/streams/monitoring/tasks/BroadcastMonitorThread.java
---
    @@ -0,0 +1,145 @@
    +/*
    + * 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
    + *
    + *   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.streams.monitoring.tasks;
    +
    +import com.fasterxml.jackson.databind.DeserializationFeature;
    +import com.fasterxml.jackson.databind.ObjectMapper;
    +import com.fasterxml.jackson.databind.module.SimpleModule;
    +import com.google.common.collect.Lists;
    +import org.apache.streams.jackson.*;
    +import org.apache.streams.monitoring.persist.MessagePersister;
    +import org.apache.streams.monitoring.persist.impl.BroadcastMessagePersister;
    +import org.apache.streams.pojo.json.*;
    +import org.slf4j.Logger;
    +
    +import javax.management.*;
    +import java.lang.management.ManagementFactory;
    +import java.util.List;
    +import java.util.Map;
    +import java.util.Set;
    +
    +/**
    + * This thread runs inside of a Streams runtime and periodically persists information
    + * from relevant JMX beans
    + */
    +public class BroadcastMonitorThread extends NotificationBroadcasterSupport implements
Runnable {
    +    private static final Logger LOGGER = org.slf4j.LoggerFactory.getLogger(BroadcastMonitorThread.class);
    +    private static MBeanServer server;
    +
    +    private long DEFAULT_WAIT_TIME = 30000;
    +    private ObjectMapper objectMapper;
    +    private Map<String, Object> streamConfig;
    +    private String broadcastURI = null;
    +    private MessagePersister messagePersister;
    +    private volatile boolean keepRunning;
    +
    +    public BroadcastMonitorThread(Map<String, Object> streamConfig) {
    +        keepRunning = true;
    +        this.streamConfig = streamConfig;
    +        server = ManagementFactory.getPlatformMBeanServer();
    +
    +        setBroadcastURI();
    +        messagePersister = new BroadcastMessagePersister(broadcastURI);
    +
    +        initializeObjectMapper();
    +    }
    +
    +    /**
    +     * Initialize our object mapper with all of our bean's custom deserializers
    +     * This way we can convert them to and from Strings dictated by our
    +     * POJOs which are generated from JSON schemas
    +     */
    +    private void initializeObjectMapper() {
    +        objectMapper = new StreamsJacksonMapper();
    +        SimpleModule simpleModule = new SimpleModule();
    +
    +        simpleModule.addDeserializer(MemoryUsageBroadcast.class, new MemoryUsageDeserializer());
    +        simpleModule.addDeserializer(ThroughputQueueBroadcast.class, new ThroughputQueueDeserializer());
    +        simpleModule.addDeserializer(StreamsTaskCounterBroadcast.class, new StreamsTaskCounterDeserializer());
    +        simpleModule.addDeserializer(DatumStatusCounterBroadcast.class, new DatumStatusCounterDeserializer());
    +
    +        objectMapper.registerModule(simpleModule);
    +        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
    +    }
    +
    +    /**
    +     * Get all relevant JMX beans, convert their values to strings, and then persist
them
    +     */
    +    @Override
    +    public void run() {
    +        while(keepRunning) {
    +            try {
    +                List<String> messages = Lists.newArrayList();
    +                Set<ObjectName> beans = server.queryNames(null, null);
    +
    +                for(ObjectName name : beans) {
    +                    String item = objectMapper.writeValueAsString(name);
    +                    Broadcast broadcast = null;
    +
    +                    if(name.getKeyPropertyList().get("type") != null) {
    +                        if (name.getKeyPropertyList().get("type").equals("ThroughputQueue"))
{
    +                            broadcast = objectMapper.readValue(item, ThroughputQueueBroadcast.class);
    +                        } else if (name.getKeyPropertyList().get("type").equals("StreamsTaskCounter"))
{
    +                            broadcast = objectMapper.readValue(item, StreamsTaskCounterBroadcast.class);
    +                        } else if (name.getKeyPropertyList().get("type").equals("DatumStatusCounter"))
{
    +                            broadcast = objectMapper.readValue(item, DatumStatusCounterBroadcast.class);
    +                        } else if (name.getKeyPropertyList().get("type").equals("Memory"))
{
    +                            broadcast = objectMapper.readValue(item, MemoryUsageBroadcast.class);
    +                        }
    +
    +                        if(broadcast != null) {
    +                            messages.add(objectMapper.writeValueAsString(broadcast));
    +                        }
    +                    }
    +                }
    +
    +                messagePersister.persistMessages(messages);
    +                Thread.sleep(DEFAULT_WAIT_TIME);
    --- End diff --
    
    And have some convention to disable entirely, perhaps interval set to -1?


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