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svn commit: r1544749 [20/23] - in /incubator/helix/site-content: ./
apidocs/reference/org/apache/helix/manager/zk/ helix-admin-webapp/
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--- incubator/helix/site-content/tutorial_user_def_rebalancer.html (added)
+++ incubator/helix/site-content/tutorial_user_def_rebalancer.html Sat Nov 23 07:11:13 2013
@@ -0,0 +1,418 @@
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+<h1><a href="./Tutorial.html">Helix Tutorial</a>: User-Defined Rebalancing</h1>
+<p>Even though Helix can compute both the location and the state of replicas internally using a default fully-automatic rebalancer, specific applications may require rebalancing strategies that optimize for different requirements. Thus, Helix allows applications to plug in arbitrary rebalancer algorithms that implement a provided interface. One of the main design goals of Helix is to provide maximum flexibility to any distributed application. Thus, it allows applications to fully implement the rebalancer, which is the core constraint solver in the system, if the application developer so chooses.</p>
+<p>Whenever the state of the cluster changes, as is the case when participants join or leave the cluster, Helix automatically calls the rebalancer to compute a new mapping of all the replicas in the resource. When using a pluggable rebalancer, the only required step is to register it with Helix. Subsequently, no additional bootstrapping steps are necessary. Helix uses reflection to look up and load the class dynamically at runtime. As a result, it is also technically possible to change the rebalancing strategy used at any time.</p>
+<p>The Rebalancer interface is as follows:</p>
+
+<div class="source">
+<pre>ResourceMapping computeResourceMapping(final Resource resource,
+ final IdealState currentIdealState, final CurrentStateOutput currentStateOutput,
+ final ClusterDataCache clusterData);
+</pre></div>
+<p>The first parameter is the resource to rebalance, the second is pre-existing ideal mappings, the third is a snapshot of the actual placements and state assignments, and the fourth is a full cache of all of the cluster data available to Helix. Internally, Helix implements the same interface for its own rebalancing routines, so a user-defined rebalancer will be cognizant of the same information about the cluster as an internal implementation. Helix strives to provide applications the ability to implement algorithms that may require a large portion of the entire state of the cluster to make the best placement and state assignment decisions possible.</p>
+<p>A ResourceMapping is a full representation of the location and the state of each replica of each partition of a given resource. This is a simple representation of the placement that the algorithm believes is the best possible. If the placement meets all defined constraints, this is what will become the actual state of the distributed system.</p>
+<div class="section">
+<div class="section">
+<h3>Specifying a Rebalancer<a name="Specifying_a_Rebalancer"></a></h3>
+<p>For implementations that set up the cluster through existing code, the following HelixAdmin calls will update the Rebalancer class:</p>
+
+<div class="source">
+<pre>IdealState idealState = helixAdmin.getResourceIdealState(clusterName, resourceName);
+idealState.setRebalanceMode(RebalanceMode.USER_DEFINED);
+idealState.setRebalancerClassName(className);
+helixAdmin.setResourceIdealState(clusterName, resourceName, idealState);
+</pre></div>
+<p>There are two key fields to set to specify that a pluggable rebalancer should be used. First, the rebalance mode should be set to USER_DEFINED, and second the rebalancer class name should be set to a class that implements Rebalancer and is within the scope of the project. The class name is a fully-qualified class name consisting of its package and its name. Without specification of the USER_DEFINED mode, the user-defined rebalancer class will not be used even if specified. Furthermore, Helix will not attempt to rebalance the resources through its standard routines if its mode is USER_DEFINED, regardless of whether or not a rebalancer class is registered.</p>
+<p>Alternatively, the rebalancer class name can be specified in a YAML file representing the cluster configuration. The requirements are the same, but the representation is more compact. Below are the first few lines of an example YAML file. To see a full YAML specification, see the <a href="./tutorial_yaml.html">YAML tutorial</a>.</p>
+
+<div class="source">
+<pre>clusterName: lock-manager-custom-rebalancer # unique name for the cluster
+resources:
+ - name: lock-group # unique resource name
+ rebalancer: # we will provide our own rebalancer
+ mode: USER_DEFINED
+ class: domain.project.helix.rebalancer.UserDefinedRebalancerClass
+...
+</pre></div></div>
+<div class="section">
+<h3>Example<a name="Example"></a></h3>
+<p>We demonstrate plugging in a simple user-defined rebalancer as part of a revisit of the <a href="./recipes/user_def_rebalancer.html">distributed lock manager</a> example. It includes a functional Rebalancer implementation, as well as the entire YAML file used to define the cluster.</p>
+<p>Consider the case where partitions are locks in a lock manager and 6 locks are to be distributed evenly to a set of participants, and only one participant can hold each lock. We can define a rebalancing algorithm that simply takes the modulus of the lock number and the number of participants to evenly distribute the locks across participants. Helix allows capping the number of partitions a participant can accept, but since locks are lightweight, we do not need to define a restriction in this case. The following is a succinct implementation of this algorithm.</p>
+
+<div class="source">
+<pre>@Override
+public ResourceAssignment computeResourceMapping(Resource resource, IdealState currentIdealState,
+ CurrentStateOutput currentStateOutput, ClusterDataCache clusterData) {
+ // Initialize an empty mapping of locks to participants
+ ResourceAssignment assignment = new ResourceAssignment(resource.getResourceName());
+
+ // Get the list of live participants in the cluster
+ List<String> liveParticipants = new ArrayList<String>(clusterData.getLiveInstances().keySet());
+
+ // Get the state model (should be a simple lock/unlock model) and the highest-priority state
+ String stateModelName = currentIdealState.getStateModelDefRef();
+ StateModelDefinition stateModelDef = clusterData.getStateModelDef(stateModelName);
+ if (stateModelDef.getStatesPriorityList().size() < 1) {
+ LOG.error("Invalid state model definition. There should be at least one state.");
+ return assignment;
+ }
+ String lockState = stateModelDef.getStatesPriorityList().get(0);
+
+ // Count the number of participants allowed to lock each lock
+ String stateCount = stateModelDef.getNumInstancesPerState(lockState);
+ int lockHolders = 0;
+ try {
+ // a numeric value is a custom-specified number of participants allowed to lock the lock
+ lockHolders = Integer.parseInt(stateCount);
+ } catch (NumberFormatException e) {
+ LOG.error("Invalid state model definition. The lock state does not have a valid count");
+ return assignment;
+ }
+
+ // Fairly assign the lock state to the participants using a simple mod-based sequential
+ // assignment. For instance, if each lock can be held by 3 participants, lock 0 would be held
+ // by participants (0, 1, 2), lock 1 would be held by (1, 2, 3), and so on, wrapping around the
+ // number of participants as necessary.
+ // This assumes a simple lock-unlock model where the only state of interest is which nodes have
+ // acquired each lock.
+ int i = 0;
+ for (Partition partition : resource.getPartitions()) {
+ Map<String, String> replicaMap = new HashMap<String, String>();
+ for (int j = i; j < i + lockHolders; j++) {
+ int participantIndex = j % liveParticipants.size();
+ String participant = liveParticipants.get(participantIndex);
+ // enforce that a participant can only have one instance of a given lock
+ if (!replicaMap.containsKey(participant)) {
+ replicaMap.put(participant, lockState);
+ }
+ }
+ assignment.addReplicaMap(partition, replicaMap);
+ i++;
+ }
+ return assignment;
+}
+</pre></div>
+<p>Here is the ResourceMapping emitted by the user-defined rebalancer for a 3-participant system whenever there is a change to the set of participants.</p>
+
+<ul>
+
+<li>Participant_A joins</li>
+</ul>
+
+<div class="source">
+<pre>{
+ "lock_0": { "Participant_A": "LOCKED"},
+ "lock_1": { "Participant_A": "LOCKED"},
+ "lock_2": { "Participant_A": "LOCKED"},
+ "lock_3": { "Participant_A": "LOCKED"},
+ "lock_4": { "Participant_A": "LOCKED"},
+ "lock_5": { "Participant_A": "LOCKED"},
+}
+</pre></div>
+<p>A ResourceMapping is a mapping for each resource of partition to the participant serving each replica and the state of each replica. The state model is a simple LOCKED/RELEASED model, so participant A holds all lock partitions in the LOCKED state.</p>
+
+<ul>
+
+<li>Participant_B joins</li>
+</ul>
+
+<div class="source">
+<pre>{
+ "lock_0": { "Participant_A": "LOCKED"},
+ "lock_1": { "Participant_B": "LOCKED"},
+ "lock_2": { "Participant_A": "LOCKED"},
+ "lock_3": { "Participant_B": "LOCKED"},
+ "lock_4": { "Participant_A": "LOCKED"},
+ "lock_5": { "Participant_B": "LOCKED"},
+}
+</pre></div>
+<p>Now that there are two participants, the simple mod-based function assigns every other lock to the second participant. On any system change, the rebalancer is invoked so that the application can define how to redistribute its resources.</p>
+
+<ul>
+
+<li>Participant_C joins (steady state)</li>
+</ul>
+
+<div class="source">
+<pre>{
+ "lock_0": { "Participant_A": "LOCKED"},
+ "lock_1": { "Participant_B": "LOCKED"},
+ "lock_2": { "Participant_C": "LOCKED"},
+ "lock_3": { "Participant_A": "LOCKED"},
+ "lock_4": { "Participant_B": "LOCKED"},
+ "lock_5": { "Participant_C": "LOCKED"},
+}
+</pre></div>
+<p>This is the steady state of the system. Notice that four of the six locks now have a different owner. That is because of the naïve modulus-based assignmemt approach used by the user-defined rebalancer. However, the interface is flexible enough to allow you to employ consistent hashing or any other scheme if minimal movement is a system requirement.</p>
+
+<ul>
+
+<li>Participant_B fails</li>
+</ul>
+
+<div class="source">
+<pre>{
+ "lock_0": { "Participant_A": "LOCKED"},
+ "lock_1": { "Participant_C": "LOCKED"},
+ "lock_2": { "Participant_A": "LOCKED"},
+ "lock_3": { "Participant_C": "LOCKED"},
+ "lock_4": { "Participant_A": "LOCKED"},
+ "lock_5": { "Participant_C": "LOCKED"},
+}
+</pre></div>
+<p>On any node failure, as in the case of node addition, the rebalancer is invoked automatically so that it can generate a new mapping as a response to the change. Helix ensures that the Rebalancer has the opportunity to reassign locks as required by the application.</p>
+
+<ul>
+
+<li>Participant_B (or the replacement for the original Participant_B) rejoins</li>
+</ul>
+
+<div class="source">
+<pre>{
+ "lock_0": { "Participant_A": "LOCKED"},
+ "lock_1": { "Participant_B": "LOCKED"},
+ "lock_2": { "Participant_C": "LOCKED"},
+ "lock_3": { "Participant_A": "LOCKED"},
+ "lock_4": { "Participant_B": "LOCKED"},
+ "lock_5": { "Participant_C": "LOCKED"},
+}
+</pre></div>
+<p>The rebalancer was invoked once again and the resulting ResourceMapping reflects the steady state.</p></div>
+<div class="section">
+<h3>Caveats<a name="Caveats"></a></h3>
+
+<ul>
+
+<li>The rebalancer class must be available at runtime, or else Helix will not attempt to rebalance at all</li>
+</ul></div></div>
+ </div>
+ </div>
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Added: incubator/helix/site-content/tutorial_yaml.html
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--- incubator/helix/site-content/tutorial_yaml.html (added)
+++ incubator/helix/site-content/tutorial_yaml.html Sat Nov 23 07:11:13 2013
@@ -0,0 +1,312 @@
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+ <img src="http://incubator.apache.org/images/egg-logo.png" />
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+
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+ | <li class="">
+ <a href="./" title="Apache Helix">
+ Apache Helix</a>
+ </li>
+ <li class="divider ">/</li>
+ <li class=""> Tutorial - YAML Cluster Setup</li>
+
+
+
+ <li id="publishDate" class="pull-right">Last Published: 2013-11-07</li>
+
+ </ul>
+ </div>
+
+
+
+ <div id="bodyColumn" >
+
+ <!-- -
+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. --><p></p>
+<h1><a href="./Tutorial.html">Helix Tutorial</a>: YAML Cluster Setup</h1>
+<p>As an alternative to using Helix Admin to set up the cluster, its resources, constraints, and the state model, Helix supports bootstrapping a cluster configuration based on a YAML file. Below is an annotated example of such a file for a simple distributed lock manager where a lock can only be LOCKED or RELEASED, and each lock only allows a single participant to hold it in the LOCKED state.</p>
+
+<div class="source">
+<pre>clusterName: lock-manager-custom-rebalancer # unique name for the cluster (required)
+resources:
+ - name: lock-group # unique resource name (required)
+ rebalancer: # required
+ mode: USER_DEFINED # required - USER_DEFINED means we will provide our own rebalancer
+ class: org.apache.helix.userdefinedrebalancer.LockManagerRebalancer # required for USER_DEFINED
+ partitions:
+ count: 12 # number of partitions for the resource (default is 1)
+ replicas: 1 # number of replicas per partition (default is 1)
+ stateModel:
+ name: lock-unlock # model name (required)
+ states: [LOCKED, RELEASED, DROPPED] # the list of possible states (required if model not built-in)
+ transitions: # the list of possible transitions (required if model not built-in)
+ - name: Unlock
+ from: LOCKED
+ to: RELEASED
+ - name: Lock
+ from: RELEASED
+ to: LOCKED
+ - name: DropLock
+ from: LOCKED
+ to: DROPPED
+ - name: DropUnlock
+ from: RELEASED
+ to: DROPPED
+ - name: Undrop
+ from: DROPPED
+ to: RELEASED
+ initialState: RELEASED # (required if model not built-in)
+ constraints:
+ state:
+ counts: # maximum number of replicas of a partition that can be in each state (required if model not built-in)
+ - name: LOCKED
+ count: "1"
+ - name: RELEASED
+ count: "-1"
+ - name: DROPPED
+ count: "-1"
+ priorityList: [LOCKED, RELEASED, DROPPED] # states in order of priority (all priorities equal if not specified)
+ transition: # transitions priority to enforce order that transitions occur
+ priorityList: [Unlock, Lock, Undrop, DropUnlock, DropLock] # all priorities equal if not specified
+participants: # list of nodes that can serve replicas (optional if dynamic joining is active, required otherwise)
+ - name: localhost_12001
+ host: localhost
+ port: 12001
+ - name: localhost_12002
+ host: localhost
+ port: 12002
+ - name: localhost_12003
+ host: localhost
+ port: 12003
+</pre></div>
+<p>Using a file like the one above, the cluster can be set up either with the command line:</p>
+
+<div class="source">
+<pre>incubator-helix/helix-core/target/helix-core/pkg/bin/YAMLClusterSetup.sh localhost:2199 lock-manager-config.yaml
+</pre></div>
+<p>or with code:</p>
+
+<div class="source">
+<pre>YAMLClusterSetup setup = new YAMLClusterSetup(zkAddress);
+InputStream input =
+ Thread.currentThread().getContextClassLoader()
+ .getResourceAsStream("lock-manager-config.yaml");
+YAMLClusterSetup.YAMLClusterConfig config = setup.setupCluster(input);
+</pre></div>
+<p>Some notes:</p>
+
+<ul>
+
+<li>
+<p>A rebalancer class is only required for the USER_DEFINED mode. It is ignored otherwise.</p></li>
+
+<li>
+<p>Built-in state models, like OnlineOffline, LeaderStandby, and MasterSlave, or state models that have already been added only require a name for stateModel. If partition and/or replica counts are not provided, a value of 1 is assumed.</p></li>
+</ul>
+ </div>
+ </div>
+
+ <hr/>
+
+ <footer>
+ <div class="container">
+ <div class="row span12">Copyright © 2013
+ <a href="http://www.apache.org/">The Apache Software Foundation</a>.
+ All Rights Reserved.
+
+ </div>
+
+ <?xml version="1.0" encoding="UTF-8"?>
+<div class="row span16">
+ <div>Apache Helix, Apache, the Apache feather logo, and the Apache Helix project logos are trademarks of The Apache Software Foundation.
+ All other marks mentioned may be trademarks or registered trademarks of their respective owners.</div>
+ <a href="http://helix.incubator.apache.org/privacy-policy.html">Privacy Policy</a>
+</div>
+
+ <p id="poweredBy" class="pull-right">
+ <a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy">
+ <img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" />
+ </a>
+ </p>
+
+ </div>
+ </footer>
+ </body>
+</html>
\ No newline at end of file
Added: incubator/helix/site-content/xref-test/org/apache/helix/ZkHelixTestManager.html
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==============================================================================
--- incubator/helix/site-content/xref-test/org/apache/helix/ZkHelixTestManager.html (added)
+++ incubator/helix/site-content/xref-test/org/apache/helix/ZkHelixTestManager.html Sat Nov 23 07:11:13 2013
@@ -0,0 +1,57 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head>
+<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
+<title>ZkHelixTestManager xref</title>
+<link type="text/css" rel="stylesheet" href="../../../stylesheet.css" />
+</head>
+<body>
+<div id="overview"><a href="../../../../testapidocs/org/apache/helix/ZkHelixTestManager.html">View Javadoc</a></div><pre>
+
+<a class="jxr_linenumber" name="1" href="#1">1</a> <strong class="jxr_keyword">package</strong> org.apache.helix;
+<a class="jxr_linenumber" name="2" href="#2">2</a>
+<a class="jxr_linenumber" name="3" href="#3">3</a> <em class="jxr_comment">/*</em>
+<a class="jxr_linenumber" name="4" href="#4">4</a> <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one</em>
+<a class="jxr_linenumber" name="5" href="#5">5</a> <em class="jxr_comment"> * or more contributor license agreements. See the NOTICE file</em>
+<a class="jxr_linenumber" name="6" href="#6">6</a> <em class="jxr_comment"> * distributed with this work for additional information</em>
+<a class="jxr_linenumber" name="7" href="#7">7</a> <em class="jxr_comment"> * regarding copyright ownership. The ASF licenses this file</em>
+<a class="jxr_linenumber" name="8" href="#8">8</a> <em class="jxr_comment"> * to you under the Apache License, Version 2.0 (the</em>
+<a class="jxr_linenumber" name="9" href="#9">9</a> <em class="jxr_comment"> * "License"); you may not use this file except in compliance</em>
+<a class="jxr_linenumber" name="10" href="#10">10</a> <em class="jxr_comment"> * with the License. You may obtain a copy of the License at</em>
+<a class="jxr_linenumber" name="11" href="#11">11</a> <em class="jxr_comment"> *</em>
+<a class="jxr_linenumber" name="12" href="#12">12</a> <em class="jxr_comment"> * <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
+<a class="jxr_linenumber" name="13" href="#13">13</a> <em class="jxr_comment"> *</em>
+<a class="jxr_linenumber" name="14" href="#14">14</a> <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing,</em>
+<a class="jxr_linenumber" name="15" href="#15">15</a> <em class="jxr_comment"> * software distributed under the License is distributed on an</em>
+<a class="jxr_linenumber" name="16" href="#16">16</a> <em class="jxr_comment"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</em>
+<a class="jxr_linenumber" name="17" href="#17">17</a> <em class="jxr_comment"> * KIND, either express or implied. See the License for the</em>
+<a class="jxr_linenumber" name="18" href="#18">18</a> <em class="jxr_comment"> * specific language governing permissions and limitations</em>
+<a class="jxr_linenumber" name="19" href="#19">19</a> <em class="jxr_comment"> * under the License.</em>
+<a class="jxr_linenumber" name="20" href="#20">20</a> <em class="jxr_comment"> */</em>
+<a class="jxr_linenumber" name="21" href="#21">21</a>
+<a class="jxr_linenumber" name="22" href="#22">22</a> <strong class="jxr_keyword">import</strong> java.util.List;
+<a class="jxr_linenumber" name="23" href="#23">23</a>
+<a class="jxr_linenumber" name="24" href="#24">24</a> <strong class="jxr_keyword">import</strong> org.apache.helix.manager.zk.CallbackHandler;
+<a class="jxr_linenumber" name="25" href="#25">25</a> <strong class="jxr_keyword">import</strong> org.apache.helix.manager.zk.ZKHelixManager;
+<a class="jxr_linenumber" name="26" href="#26">26</a> <strong class="jxr_keyword">import</strong> org.apache.helix.manager.zk.ZkClient;
+<a class="jxr_linenumber" name="27" href="#27">27</a>
+<a class="jxr_linenumber" name="28" href="#28">28</a> <em class="jxr_comment">// ZkHelixManager used for test only. expose more class members</em>
+<a class="jxr_linenumber" name="29" href="#29">29</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../org/apache/helix/ZkHelixTestManager.html">ZkHelixTestManager</a> <strong class="jxr_keyword">extends</strong> ZKHelixManager {
+<a class="jxr_linenumber" name="30" href="#30">30</a>
+<a class="jxr_linenumber" name="31" href="#31">31</a> <strong class="jxr_keyword">public</strong> <a href="../../../org/apache/helix/ZkHelixTestManager.html">ZkHelixTestManager</a>(String clusterName, String instanceName, InstanceType instanceType,
+<a class="jxr_linenumber" name="32" href="#32">32</a> String zkConnectString) <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="33" href="#33">33</a> <strong class="jxr_keyword">super</strong>(clusterName, instanceName, instanceType, zkConnectString);
+<a class="jxr_linenumber" name="34" href="#34">34</a> <em class="jxr_comment">// TODO Auto-generated constructor stub</em>
+<a class="jxr_linenumber" name="35" href="#35">35</a> }
+<a class="jxr_linenumber" name="36" href="#36">36</a>
+<a class="jxr_linenumber" name="37" href="#37">37</a> <strong class="jxr_keyword">public</strong> ZkClient getZkClient() {
+<a class="jxr_linenumber" name="38" href="#38">38</a> <strong class="jxr_keyword">return</strong> _zkClient;
+<a class="jxr_linenumber" name="39" href="#39">39</a> }
+<a class="jxr_linenumber" name="40" href="#40">40</a>
+<a class="jxr_linenumber" name="41" href="#41">41</a> <strong class="jxr_keyword">public</strong> List<CallbackHandler> getHandlers() {
+<a class="jxr_linenumber" name="42" href="#42">42</a> <strong class="jxr_keyword">return</strong> _handlers;
+<a class="jxr_linenumber" name="43" href="#43">43</a> }
+<a class="jxr_linenumber" name="44" href="#44">44</a> }
+</pre>
+<hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body>
+</html>
Added: incubator/helix/site-content/xref-test/org/apache/helix/integration/TestSchedulerMsgContraints.html
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--- incubator/helix/site-content/xref-test/org/apache/helix/integration/TestSchedulerMsgContraints.html (added)
+++ incubator/helix/site-content/xref-test/org/apache/helix/integration/TestSchedulerMsgContraints.html Sat Nov 23 07:11:13 2013
@@ -0,0 +1,267 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head>
+<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
+<title>TestSchedulerMsgContraints xref</title>
+<link type="text/css" rel="stylesheet" href="../../../../stylesheet.css" />
+</head>
+<body>
+<div id="overview"><a href="../../../../../testapidocs/org/apache/helix/integration/TestSchedulerMsgContraints.html">View Javadoc</a></div><pre>
+
+<a class="jxr_linenumber" name="1" href="#1">1</a> <strong class="jxr_keyword">package</strong> org.apache.helix.integration;
+<a class="jxr_linenumber" name="2" href="#2">2</a>
+<a class="jxr_linenumber" name="3" href="#3">3</a> <strong class="jxr_keyword">import</strong> java.io.StringWriter;
+<a class="jxr_linenumber" name="4" href="#4">4</a> <strong class="jxr_keyword">import</strong> java.util.Map;
+<a class="jxr_linenumber" name="5" href="#5">5</a> <strong class="jxr_keyword">import</strong> java.util.Set;
+<a class="jxr_linenumber" name="6" href="#6">6</a> <strong class="jxr_keyword">import</strong> java.util.TreeMap;
+<a class="jxr_linenumber" name="7" href="#7">7</a> <strong class="jxr_keyword">import</strong> java.util.UUID;
+<a class="jxr_linenumber" name="8" href="#8">8</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.ConcurrentHashMap;
+<a class="jxr_linenumber" name="9" href="#9">9</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.ConcurrentSkipListSet;
+<a class="jxr_linenumber" name="10" href="#10">10</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.CountDownLatch;
+<a class="jxr_linenumber" name="11" href="#11">11</a>
+<a class="jxr_linenumber" name="12" href="#12">12</a> <strong class="jxr_keyword">import</strong> org.apache.helix.Criteria;
+<a class="jxr_linenumber" name="13" href="#13">13</a> <strong class="jxr_keyword">import</strong> org.apache.helix.HelixDataAccessor;
+<a class="jxr_linenumber" name="14" href="#14">14</a> <strong class="jxr_keyword">import</strong> org.apache.helix.HelixManager;
+<a class="jxr_linenumber" name="15" href="#15">15</a> <strong class="jxr_keyword">import</strong> org.apache.helix.InstanceType;
+<a class="jxr_linenumber" name="16" href="#16">16</a> <strong class="jxr_keyword">import</strong> org.apache.helix.NotificationContext;
+<a class="jxr_linenumber" name="17" href="#17">17</a> <strong class="jxr_keyword">import</strong> org.apache.helix.PropertyKey;
+<a class="jxr_linenumber" name="18" href="#18">18</a> <strong class="jxr_keyword">import</strong> org.apache.helix.ZNRecord;
+<a class="jxr_linenumber" name="19" href="#19">19</a> <strong class="jxr_keyword">import</strong> org.apache.helix.api.id.MessageId;
+<a class="jxr_linenumber" name="20" href="#20">20</a> <strong class="jxr_keyword">import</strong> org.apache.helix.api.id.SessionId;
+<a class="jxr_linenumber" name="21" href="#21">21</a> <strong class="jxr_keyword">import</strong> org.apache.helix.manager.zk.DefaultSchedulerMessageHandlerFactory;
+<a class="jxr_linenumber" name="22" href="#22">22</a> <strong class="jxr_keyword">import</strong> org.apache.helix.messaging.AsyncCallback;
+<a class="jxr_linenumber" name="23" href="#23">23</a> <strong class="jxr_keyword">import</strong> org.apache.helix.messaging.handling.HelixTaskResult;
+<a class="jxr_linenumber" name="24" href="#24">24</a> <strong class="jxr_keyword">import</strong> org.apache.helix.messaging.handling.MessageHandler;
+<a class="jxr_linenumber" name="25" href="#25">25</a> <strong class="jxr_keyword">import</strong> org.apache.helix.messaging.handling.MessageHandlerFactory;
+<a class="jxr_linenumber" name="26" href="#26">26</a> <strong class="jxr_keyword">import</strong> org.apache.helix.model.ClusterConstraints.ConstraintType;
+<a class="jxr_linenumber" name="27" href="#27">27</a> <strong class="jxr_keyword">import</strong> org.apache.helix.model.ConstraintItem;
+<a class="jxr_linenumber" name="28" href="#28">28</a> <strong class="jxr_keyword">import</strong> org.apache.helix.model.Message;
+<a class="jxr_linenumber" name="29" href="#29">29</a> <strong class="jxr_keyword">import</strong> org.apache.helix.model.Message.MessageState;
+<a class="jxr_linenumber" name="30" href="#30">30</a> <strong class="jxr_keyword">import</strong> org.apache.helix.model.Message.MessageType;
+<a class="jxr_linenumber" name="31" href="#31">31</a> <strong class="jxr_keyword">import</strong> org.codehaus.jackson.map.ObjectMapper;
+<a class="jxr_linenumber" name="32" href="#32">32</a> <strong class="jxr_keyword">import</strong> org.codehaus.jackson.map.SerializationConfig;
+<a class="jxr_linenumber" name="33" href="#33">33</a> <strong class="jxr_keyword">import</strong> org.testng.Assert;
+<a class="jxr_linenumber" name="34" href="#34">34</a> <strong class="jxr_keyword">import</strong> org.testng.annotations.Test;
+<a class="jxr_linenumber" name="35" href="#35">35</a>
+<a class="jxr_linenumber" name="36" href="#36">36</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/apache/helix/integration/TestSchedulerMsgContraints.html">TestSchedulerMsgContraints</a> <strong class="jxr_keyword">extends</strong> <a href="../../../../org/apache/helix/integration/ZkStandAloneCMTestBaseWithPropertyServerCheck.html">ZkStandAloneCMTestBaseWithPropertyServerCheck</a> {
+<a class="jxr_linenumber" name="37" href="#37">37</a>
+<a class="jxr_linenumber" name="38" href="#38">38</a> <strong class="jxr_keyword">class</strong> <a href="../../../../org/apache/helix/integration/TestSchedulerMsgContraints.html">MockAsyncCallback</a> <strong class="jxr_keyword">extends</strong> AsyncCallback {
+<a class="jxr_linenumber" name="39" href="#39">39</a> Message _message;
+<a class="jxr_linenumber" name="40" href="#40">40</a>
+<a class="jxr_linenumber" name="41" href="#41">41</a> <strong class="jxr_keyword">public</strong> <a href="../../../../org/apache/helix/integration/TestSchedulerMsgContraints.html">MockAsyncCallback</a>() {
+<a class="jxr_linenumber" name="42" href="#42">42</a> }
+<a class="jxr_linenumber" name="43" href="#43">43</a>
+<a class="jxr_linenumber" name="44" href="#44">44</a> @Override
+<a class="jxr_linenumber" name="45" href="#45">45</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> onTimeOut() {
+<a class="jxr_linenumber" name="46" href="#46">46</a> <em class="jxr_comment">// TODO Auto-generated method stub</em>
+<a class="jxr_linenumber" name="47" href="#47">47</a> }
+<a class="jxr_linenumber" name="48" href="#48">48</a>
+<a class="jxr_linenumber" name="49" href="#49">49</a> @Override
+<a class="jxr_linenumber" name="50" href="#50">50</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> onReplyMessage(Message message) {
+<a class="jxr_linenumber" name="51" href="#51">51</a> _message = message;
+<a class="jxr_linenumber" name="52" href="#52">52</a> }
+<a class="jxr_linenumber" name="53" href="#53">53</a> }
+<a class="jxr_linenumber" name="54" href="#54">54</a>
+<a class="jxr_linenumber" name="55" href="#55">55</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/apache/helix/integration/TestSchedulerMsgContraints.html">TestMessagingHandlerFactoryLatch</a> <strong class="jxr_keyword">implements</strong> MessageHandlerFactory {
+<a class="jxr_linenumber" name="56" href="#56">56</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">volatile</strong> CountDownLatch _latch = <strong class="jxr_keyword">new</strong> CountDownLatch(1);
+<a class="jxr_linenumber" name="57" href="#57">57</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> _messageCount = 0;
+<a class="jxr_linenumber" name="58" href="#58">58</a> <strong class="jxr_keyword">public</strong> Map<String, Set<String>> _results = <strong class="jxr_keyword">new</strong> ConcurrentHashMap<String, Set<String>>();
+<a class="jxr_linenumber" name="59" href="#59">59</a>
+<a class="jxr_linenumber" name="60" href="#60">60</a> @Override
+<a class="jxr_linenumber" name="61" href="#61">61</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">synchronized</strong> MessageHandler createHandler(Message message, NotificationContext context) {
+<a class="jxr_linenumber" name="62" href="#62">62</a> _messageCount++;
+<a class="jxr_linenumber" name="63" href="#63">63</a> <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/integration/TestSchedulerMsgContraints.html">TestMessagingHandlerLatch</a>(message, context);
+<a class="jxr_linenumber" name="64" href="#64">64</a> }
+<a class="jxr_linenumber" name="65" href="#65">65</a>
+<a class="jxr_linenumber" name="66" href="#66">66</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">synchronized</strong> <strong class="jxr_keyword">void</strong> signal() {
+<a class="jxr_linenumber" name="67" href="#67">67</a> _latch.countDown();
+<a class="jxr_linenumber" name="68" href="#68">68</a> _latch = <strong class="jxr_keyword">new</strong> CountDownLatch(1);
+<a class="jxr_linenumber" name="69" href="#69">69</a> }
+<a class="jxr_linenumber" name="70" href="#70">70</a>
+<a class="jxr_linenumber" name="71" href="#71">71</a> @Override
+<a class="jxr_linenumber" name="72" href="#72">72</a> <strong class="jxr_keyword">public</strong> String getMessageType() {
+<a class="jxr_linenumber" name="73" href="#73">73</a> <strong class="jxr_keyword">return</strong> <span class="jxr_string">"TestMessagingHandlerLatch"</span>;
+<a class="jxr_linenumber" name="74" href="#74">74</a> }
+<a class="jxr_linenumber" name="75" href="#75">75</a>
+<a class="jxr_linenumber" name="76" href="#76">76</a> @Override
+<a class="jxr_linenumber" name="77" href="#77">77</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> reset() {
+<a class="jxr_linenumber" name="78" href="#78">78</a> <em class="jxr_comment">// TODO Auto-generated method stub</em>
+<a class="jxr_linenumber" name="79" href="#79">79</a> }
+<a class="jxr_linenumber" name="80" href="#80">80</a>
+<a class="jxr_linenumber" name="81" href="#81">81</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/apache/helix/integration/TestSchedulerMsgContraints.html">TestMessagingHandlerLatch</a> <strong class="jxr_keyword">extends</strong> MessageHandler {
+<a class="jxr_linenumber" name="82" href="#82">82</a> <strong class="jxr_keyword">public</strong> <a href="../../../../org/apache/helix/integration/TestSchedulerMsgContraints.html">TestMessagingHandlerLatch</a>(Message message, NotificationContext context) {
+<a class="jxr_linenumber" name="83" href="#83">83</a> <strong class="jxr_keyword">super</strong>(message, context);
+<a class="jxr_linenumber" name="84" href="#84">84</a> <em class="jxr_comment">// TODO Auto-generated constructor stub</em>
+<a class="jxr_linenumber" name="85" href="#85">85</a> }
+<a class="jxr_linenumber" name="86" href="#86">86</a>
+<a class="jxr_linenumber" name="87" href="#87">87</a> @Override
+<a class="jxr_linenumber" name="88" href="#88">88</a> <strong class="jxr_keyword">public</strong> HelixTaskResult handleMessage() <strong class="jxr_keyword">throws</strong> InterruptedException {
+<a class="jxr_linenumber" name="89" href="#89">89</a> _latch.await();
+<a class="jxr_linenumber" name="90" href="#90">90</a> HelixTaskResult result = <strong class="jxr_keyword">new</strong> HelixTaskResult();
+<a class="jxr_linenumber" name="91" href="#91">91</a> result.setSuccess(<strong class="jxr_keyword">true</strong>);
+<a class="jxr_linenumber" name="92" href="#92">92</a> result.getTaskResultMap().put(<span class="jxr_string">"Message"</span>, _message.getMessageId().stringify());
+<a class="jxr_linenumber" name="93" href="#93">93</a> String destName = _message.getTgtName();
+<a class="jxr_linenumber" name="94" href="#94">94</a> <strong class="jxr_keyword">synchronized</strong> (_results) {
+<a class="jxr_linenumber" name="95" href="#95">95</a> <strong class="jxr_keyword">if</strong> (!_results.containsKey(_message.getPartitionId().stringify())) {
+<a class="jxr_linenumber" name="96" href="#96">96</a> _results
+<a class="jxr_linenumber" name="97" href="#97">97</a> .put(_message.getPartitionId().stringify(), <strong class="jxr_keyword">new</strong> ConcurrentSkipListSet<String>());
+<a class="jxr_linenumber" name="98" href="#98">98</a> }
+<a class="jxr_linenumber" name="99" href="#99">99</a> }
+<a class="jxr_linenumber" name="100" href="#100">100</a> _results.get(_message.getPartitionId().stringify()).add(destName);
+<a class="jxr_linenumber" name="101" href="#101">101</a> <em class="jxr_comment">// System.err.println("Message " + _message.getMsgId() + " executed");</em>
+<a class="jxr_linenumber" name="102" href="#102">102</a> <strong class="jxr_keyword">return</strong> result;
+<a class="jxr_linenumber" name="103" href="#103">103</a> }
+<a class="jxr_linenumber" name="104" href="#104">104</a>
+<a class="jxr_linenumber" name="105" href="#105">105</a> @Override
+<a class="jxr_linenumber" name="106" href="#106">106</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> onError(Exception e, ErrorCode code, ErrorType type) {
+<a class="jxr_linenumber" name="107" href="#107">107</a> <em class="jxr_comment">// TODO Auto-generated method stub</em>
+<a class="jxr_linenumber" name="108" href="#108">108</a> }
+<a class="jxr_linenumber" name="109" href="#109">109</a> }
+<a class="jxr_linenumber" name="110" href="#110">110</a> }
+<a class="jxr_linenumber" name="111" href="#111">111</a>
+<a class="jxr_linenumber" name="112" href="#112">112</a> @Test
+<a class="jxr_linenumber" name="113" href="#113">113</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> testSchedulerMsgContraints() <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="114" href="#114">114</a> <a href="../../../../org/apache/helix/integration/TestSchedulerMsgContraints.html">TestMessagingHandlerFactoryLatch</a> factory = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/integration/TestSchedulerMsgContraints.html">TestMessagingHandlerFactoryLatch</a>();
+<a class="jxr_linenumber" name="115" href="#115">115</a> HelixManager manager = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="116" href="#116">116</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i < NODE_NR; i++) {
+<a class="jxr_linenumber" name="117" href="#117">117</a> String hostDest = <span class="jxr_string">"localhost_"</span> + (START_PORT + i);
+<a class="jxr_linenumber" name="118" href="#118">118</a> _startCMResultMap.get(hostDest)._manager.getMessagingService().registerMessageHandlerFactory(
+<a class="jxr_linenumber" name="119" href="#119">119</a> factory.getMessageType(), factory);
+<a class="jxr_linenumber" name="120" href="#120">120</a> <em class="jxr_comment">//</em>
+<a class="jxr_linenumber" name="121" href="#121">121</a> _startCMResultMap.get(hostDest)._manager.getMessagingService().registerMessageHandlerFactory(
+<a class="jxr_linenumber" name="122" href="#122">122</a> factory.getMessageType(), factory);
+<a class="jxr_linenumber" name="123" href="#123">123</a> manager = _startCMResultMap.get(hostDest)._manager;
+<a class="jxr_linenumber" name="124" href="#124">124</a> }
+<a class="jxr_linenumber" name="125" href="#125">125</a>
+<a class="jxr_linenumber" name="126" href="#126">126</a> Message schedulerMessage =
+<a class="jxr_linenumber" name="127" href="#127">127</a> <strong class="jxr_keyword">new</strong> Message(MessageType.SCHEDULER_MSG + <span class="jxr_string">""</span>, MessageId.from(UUID.randomUUID().toString()));
+<a class="jxr_linenumber" name="128" href="#128">128</a> schedulerMessage.setTgtSessionId(SessionId.from(<span class="jxr_string">"*"</span>));
+<a class="jxr_linenumber" name="129" href="#129">129</a> schedulerMessage.setTgtName(<span class="jxr_string">"CONTROLLER"</span>);
+<a class="jxr_linenumber" name="130" href="#130">130</a> <em class="jxr_comment">// TODO: change it to "ADMIN" ?</em>
+<a class="jxr_linenumber" name="131" href="#131">131</a> schedulerMessage.setSrcName(<span class="jxr_string">"CONTROLLER"</span>);
+<a class="jxr_linenumber" name="132" href="#132">132</a>
+<a class="jxr_linenumber" name="133" href="#133">133</a> <em class="jxr_comment">// Template for the individual message sent to each participant</em>
+<a class="jxr_linenumber" name="134" href="#134">134</a> Message msg = <strong class="jxr_keyword">new</strong> Message(factory.getMessageType(), MessageId.from(<span class="jxr_string">"Template"</span>));
+<a class="jxr_linenumber" name="135" href="#135">135</a> msg.setTgtSessionId(SessionId.from(<span class="jxr_string">"*"</span>));
+<a class="jxr_linenumber" name="136" href="#136">136</a> msg.setMsgState(MessageState.NEW);
+<a class="jxr_linenumber" name="137" href="#137">137</a>
+<a class="jxr_linenumber" name="138" href="#138">138</a> <em class="jxr_comment">// Criteria to send individual messages</em>
+<a class="jxr_linenumber" name="139" href="#139">139</a> Criteria cr = <strong class="jxr_keyword">new</strong> Criteria();
+<a class="jxr_linenumber" name="140" href="#140">140</a> cr.setInstanceName(<span class="jxr_string">"localhost_%"</span>);
+<a class="jxr_linenumber" name="141" href="#141">141</a> cr.setRecipientInstanceType(InstanceType.PARTICIPANT);
+<a class="jxr_linenumber" name="142" href="#142">142</a> cr.setSessionSpecific(false);
+<a class="jxr_linenumber" name="143" href="#143">143</a> cr.setResource(<span class="jxr_string">"%"</span>);
+<a class="jxr_linenumber" name="144" href="#144">144</a> cr.setPartition(<span class="jxr_string">"%"</span>);
+<a class="jxr_linenumber" name="145" href="#145">145</a>
+<a class="jxr_linenumber" name="146" href="#146">146</a> ObjectMapper mapper = <strong class="jxr_keyword">new</strong> ObjectMapper();
+<a class="jxr_linenumber" name="147" href="#147">147</a> SerializationConfig serializationConfig = mapper.getSerializationConfig();
+<a class="jxr_linenumber" name="148" href="#148">148</a> serializationConfig.set(SerializationConfig.Feature.INDENT_OUTPUT, <strong class="jxr_keyword">true</strong>);
+<a class="jxr_linenumber" name="149" href="#149">149</a>
+<a class="jxr_linenumber" name="150" href="#150">150</a> StringWriter sw = <strong class="jxr_keyword">new</strong> StringWriter();
+<a class="jxr_linenumber" name="151" href="#151">151</a> mapper.writeValue(sw, cr);
+<a class="jxr_linenumber" name="152" href="#152">152</a>
+<a class="jxr_linenumber" name="153" href="#153">153</a> String crString = sw.toString();
+<a class="jxr_linenumber" name="154" href="#154">154</a>
+<a class="jxr_linenumber" name="155" href="#155">155</a> schedulerMessage.getRecord().setSimpleField(<span class="jxr_string">"Criteria"</span>, crString);
+<a class="jxr_linenumber" name="156" href="#156">156</a> schedulerMessage.getRecord().setMapField(<span class="jxr_string">"MessageTemplate"</span>, msg.getRecord().getSimpleFields());
+<a class="jxr_linenumber" name="157" href="#157">157</a> schedulerMessage.getRecord().setSimpleField(<span class="jxr_string">"TIMEOUT"</span>, <span class="jxr_string">"-1"</span>);
+<a class="jxr_linenumber" name="158" href="#158">158</a> schedulerMessage.getRecord().setSimpleField(<span class="jxr_string">"WAIT_ALL"</span>, <span class="jxr_string">"true"</span>);
+<a class="jxr_linenumber" name="159" href="#159">159</a> schedulerMessage.getRecord().setSimpleField(
+<a class="jxr_linenumber" name="160" href="#160">160</a> DefaultSchedulerMessageHandlerFactory.SCHEDULER_TASK_QUEUE, <span class="jxr_string">"TestSchedulerMsgContraints"</span>);
+<a class="jxr_linenumber" name="161" href="#161">161</a>
+<a class="jxr_linenumber" name="162" href="#162">162</a> Criteria cr2 = <strong class="jxr_keyword">new</strong> Criteria();
+<a class="jxr_linenumber" name="163" href="#163">163</a> cr2.setRecipientInstanceType(InstanceType.CONTROLLER);
+<a class="jxr_linenumber" name="164" href="#164">164</a> cr2.setInstanceName(<span class="jxr_string">"*"</span>);
+<a class="jxr_linenumber" name="165" href="#165">165</a> cr2.setSessionSpecific(false);
+<a class="jxr_linenumber" name="166" href="#166">166</a>
+<a class="jxr_linenumber" name="167" href="#167">167</a> <a href="../../../../org/apache/helix/integration/TestSchedulerMsgContraints.html">MockAsyncCallback</a> callback = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/integration/TestSchedulerMsgContraints.html">MockAsyncCallback</a>();
+<a class="jxr_linenumber" name="168" href="#168">168</a> mapper = <strong class="jxr_keyword">new</strong> ObjectMapper();
+<a class="jxr_linenumber" name="169" href="#169">169</a> serializationConfig = mapper.getSerializationConfig();
+<a class="jxr_linenumber" name="170" href="#170">170</a> serializationConfig.set(SerializationConfig.Feature.INDENT_OUTPUT, <strong class="jxr_keyword">true</strong>);
+<a class="jxr_linenumber" name="171" href="#171">171</a>
+<a class="jxr_linenumber" name="172" href="#172">172</a> sw = <strong class="jxr_keyword">new</strong> StringWriter();
+<a class="jxr_linenumber" name="173" href="#173">173</a> mapper.writeValue(sw, cr);
+<a class="jxr_linenumber" name="174" href="#174">174</a>
+<a class="jxr_linenumber" name="175" href="#175">175</a> HelixDataAccessor helixDataAccessor = manager.getHelixDataAccessor();
+<a class="jxr_linenumber" name="176" href="#176">176</a> PropertyKey.Builder keyBuilder = helixDataAccessor.keyBuilder();
+<a class="jxr_linenumber" name="177" href="#177">177</a>
+<a class="jxr_linenumber" name="178" href="#178">178</a> <em class="jxr_comment">// Set contraints that only 1 msg per participant</em>
+<a class="jxr_linenumber" name="179" href="#179">179</a> Map<String, String> constraints = <strong class="jxr_keyword">new</strong> TreeMap<String, String>();
+<a class="jxr_linenumber" name="180" href="#180">180</a> constraints.put(<span class="jxr_string">"MESSAGE_TYPE"</span>, <span class="jxr_string">"STATE_TRANSITION"</span>);
+<a class="jxr_linenumber" name="181" href="#181">181</a> constraints.put(<span class="jxr_string">"TRANSITION"</span>, <span class="jxr_string">"OFFLINE-COMPLETED"</span>);
+<a class="jxr_linenumber" name="182" href="#182">182</a> constraints.put(<span class="jxr_string">"CONSTRAINT_VALUE"</span>, <span class="jxr_string">"1"</span>);
+<a class="jxr_linenumber" name="183" href="#183">183</a> constraints.put(<span class="jxr_string">"INSTANCE"</span>, <span class="jxr_string">".*"</span>);
+<a class="jxr_linenumber" name="184" href="#184">184</a> manager.getClusterManagmentTool().setConstraint(manager.getClusterName(),
+<a class="jxr_linenumber" name="185" href="#185">185</a> ConstraintType.MESSAGE_CONSTRAINT, <span class="jxr_string">"constraint1"</span>, <strong class="jxr_keyword">new</strong> ConstraintItem(constraints));
+<a class="jxr_linenumber" name="186" href="#186">186</a>
+<a class="jxr_linenumber" name="187" href="#187">187</a> <em class="jxr_comment">// Send scheduler message</em>
+<a class="jxr_linenumber" name="188" href="#188">188</a> crString = sw.toString();
+<a class="jxr_linenumber" name="189" href="#189">189</a> schedulerMessage.getRecord().setSimpleField(<span class="jxr_string">"Criteria"</span>, crString);
+<a class="jxr_linenumber" name="190" href="#190">190</a> manager.getMessagingService().sendAndWait(cr2, schedulerMessage, callback, -1);
+<a class="jxr_linenumber" name="191" href="#191">191</a> String msgId =
+<a class="jxr_linenumber" name="192" href="#192">192</a> callback._message.getResultMap()
+<a class="jxr_linenumber" name="193" href="#193">193</a> .get(DefaultSchedulerMessageHandlerFactory.SCHEDULER_MSG_ID);
+<a class="jxr_linenumber" name="194" href="#194">194</a>
+<a class="jxr_linenumber" name="195" href="#195">195</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> j = 0; j < 10; j++) {
+<a class="jxr_linenumber" name="196" href="#196">196</a> Thread.sleep(200);
+<a class="jxr_linenumber" name="197" href="#197">197</a> PropertyKey controllerTaskStatus =
+<a class="jxr_linenumber" name="198" href="#198">198</a> keyBuilder.controllerTaskStatus(MessageType.SCHEDULER_MSG.toString(), msgId);
+<a class="jxr_linenumber" name="199" href="#199">199</a> ZNRecord statusUpdate = helixDataAccessor.getProperty(controllerTaskStatus).getRecord();
+<a class="jxr_linenumber" name="200" href="#200">200</a> <strong class="jxr_keyword">if</strong> (statusUpdate.getMapFields().containsKey(<span class="jxr_string">"SentMessageCount"</span>)) {
+<a class="jxr_linenumber" name="201" href="#201">201</a> Assert.assertEquals(
+<a class="jxr_linenumber" name="202" href="#202">202</a> statusUpdate.getMapFields().get(<span class="jxr_string">"SentMessageCount"</span>).get(<span class="jxr_string">"MessageCount"</span>), <span class="jxr_string">""</span>
+<a class="jxr_linenumber" name="203" href="#203">203</a> + (_PARTITIONS * 3));
+<a class="jxr_linenumber" name="204" href="#204">204</a> <strong class="jxr_keyword">break</strong>;
+<a class="jxr_linenumber" name="205" href="#205">205</a> }
+<a class="jxr_linenumber" name="206" href="#206">206</a> }
+<a class="jxr_linenumber" name="207" href="#207">207</a>
+<a class="jxr_linenumber" name="208" href="#208">208</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i < _PARTITIONS * 3 / 5; i++) {
+<a class="jxr_linenumber" name="209" href="#209">209</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> j = 0; j < 10; j++) {
+<a class="jxr_linenumber" name="210" href="#210">210</a> Thread.sleep(300);
+<a class="jxr_linenumber" name="211" href="#211">211</a> <strong class="jxr_keyword">if</strong> (factory._messageCount == 5 * (i + 1))
+<a class="jxr_linenumber" name="212" href="#212">212</a> <strong class="jxr_keyword">break</strong>;
+<a class="jxr_linenumber" name="213" href="#213">213</a> }
+<a class="jxr_linenumber" name="214" href="#214">214</a> Thread.sleep(300);
+<a class="jxr_linenumber" name="215" href="#215">215</a> Assert.assertEquals(factory._messageCount, 5 * (i + 1));
+<a class="jxr_linenumber" name="216" href="#216">216</a> factory.signal();
+<a class="jxr_linenumber" name="217" href="#217">217</a> <em class="jxr_comment">// System.err.println(i);</em>
+<a class="jxr_linenumber" name="218" href="#218">218</a> }
+<a class="jxr_linenumber" name="219" href="#219">219</a>
+<a class="jxr_linenumber" name="220" href="#220">220</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> j = 0; j < 10; j++) {
+<a class="jxr_linenumber" name="221" href="#221">221</a> Thread.sleep(200);
+<a class="jxr_linenumber" name="222" href="#222">222</a> PropertyKey controllerTaskStatus =
+<a class="jxr_linenumber" name="223" href="#223">223</a> keyBuilder.controllerTaskStatus(MessageType.SCHEDULER_MSG.toString(), msgId);
+<a class="jxr_linenumber" name="224" href="#224">224</a> ZNRecord statusUpdate = helixDataAccessor.getProperty(controllerTaskStatus).getRecord();
+<a class="jxr_linenumber" name="225" href="#225">225</a> <strong class="jxr_keyword">if</strong> (statusUpdate.getMapFields().containsKey(<span class="jxr_string">"Summary"</span>)) {
+<a class="jxr_linenumber" name="226" href="#226">226</a> <strong class="jxr_keyword">break</strong>;
+<a class="jxr_linenumber" name="227" href="#227">227</a> }
+<a class="jxr_linenumber" name="228" href="#228">228</a> }
+<a class="jxr_linenumber" name="229" href="#229">229</a>
+<a class="jxr_linenumber" name="230" href="#230">230</a> Assert.assertEquals(_PARTITIONS, factory._results.size());
+<a class="jxr_linenumber" name="231" href="#231">231</a> PropertyKey controllerTaskStatus =
+<a class="jxr_linenumber" name="232" href="#232">232</a> keyBuilder.controllerTaskStatus(MessageType.SCHEDULER_MSG.toString(), msgId);
+<a class="jxr_linenumber" name="233" href="#233">233</a> ZNRecord statusUpdate = helixDataAccessor.getProperty(controllerTaskStatus).getRecord();
+<a class="jxr_linenumber" name="234" href="#234">234</a> Assert.assertTrue(statusUpdate.getMapField(<span class="jxr_string">"SentMessageCount"</span>).get(<span class="jxr_string">"MessageCount"</span>)
+<a class="jxr_linenumber" name="235" href="#235">235</a> .equals(<span class="jxr_string">""</span> + (_PARTITIONS * 3)));
+<a class="jxr_linenumber" name="236" href="#236">236</a> <strong class="jxr_keyword">int</strong> messageResultCount = 0;
+<a class="jxr_linenumber" name="237" href="#237">237</a> <strong class="jxr_keyword">for</strong> (String key : statusUpdate.getMapFields().keySet()) {
+<a class="jxr_linenumber" name="238" href="#238">238</a> <strong class="jxr_keyword">if</strong> (key.startsWith(<span class="jxr_string">"MessageResult "</span>)) {
+<a class="jxr_linenumber" name="239" href="#239">239</a> messageResultCount++;
+<a class="jxr_linenumber" name="240" href="#240">240</a> }
+<a class="jxr_linenumber" name="241" href="#241">241</a> }
+<a class="jxr_linenumber" name="242" href="#242">242</a> Assert.assertEquals(messageResultCount, _PARTITIONS * 3);
+<a class="jxr_linenumber" name="243" href="#243">243</a>
+<a class="jxr_linenumber" name="244" href="#244">244</a> <strong class="jxr_keyword">int</strong> count = 0;
+<a class="jxr_linenumber" name="245" href="#245">245</a> <strong class="jxr_keyword">for</strong> (Set<String> val : factory._results.values()) {
+<a class="jxr_linenumber" name="246" href="#246">246</a> count += val.size();
+<a class="jxr_linenumber" name="247" href="#247">247</a> }
+<a class="jxr_linenumber" name="248" href="#248">248</a> Assert.assertEquals(count, _PARTITIONS * 3);
+<a class="jxr_linenumber" name="249" href="#249">249</a>
+<a class="jxr_linenumber" name="250" href="#250">250</a> manager.getClusterManagmentTool().removeConstraint(manager.getClusterName(),
+<a class="jxr_linenumber" name="251" href="#251">251</a> ConstraintType.MESSAGE_CONSTRAINT, <span class="jxr_string">"constraint1"</span>);
+<a class="jxr_linenumber" name="252" href="#252">252</a>
+<a class="jxr_linenumber" name="253" href="#253">253</a> }
+<a class="jxr_linenumber" name="254" href="#254">254</a> }
+</pre>
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