diff --git a/Bench4Q-Agent/src/main/java/org/bench4q/agent/api/HomeController.java b/Bench4Q-Agent/src/main/java/org/bench4q/agent/api/HomeController.java
index 1077e3a2..c3cc85e9 100644
--- a/Bench4Q-Agent/src/main/java/org/bench4q/agent/api/HomeController.java
+++ b/Bench4Q-Agent/src/main/java/org/bench4q/agent/api/HomeController.java
@@ -5,8 +5,8 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.UUID;
 
-import org.bench4q.agent.scenario.ScenarioContext;
-import org.bench4q.agent.scenario.ScenarioEngine;
+import org.bench4q.agent.scenario.engine.ScenarioContext;
+import org.bench4q.agent.scenario.engine.ScenarioEngine;
 import org.bench4q.share.models.agent.ServerStatusModel;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Controller;
diff --git a/Bench4Q-Agent/src/main/java/org/bench4q/agent/api/TestController.java b/Bench4Q-Agent/src/main/java/org/bench4q/agent/api/TestController.java
index 6a007d8c..45ff91ca 100644
--- a/Bench4Q-Agent/src/main/java/org/bench4q/agent/api/TestController.java
+++ b/Bench4Q-Agent/src/main/java/org/bench4q/agent/api/TestController.java
@@ -10,9 +10,9 @@ import org.apache.log4j.Logger;
 import org.bench4q.agent.datacollector.impl.BehaviorStatusCodeResult;
 import org.bench4q.agent.plugin.ParameterFileCollector;
 import org.bench4q.agent.scenario.Scenario;
-import org.bench4q.agent.scenario.ScenarioContext;
-import org.bench4q.agent.scenario.ScenarioEngine;
 import org.bench4q.agent.scenario.behavior.Behavior;
+import org.bench4q.agent.scenario.engine.ScenarioContext;
+import org.bench4q.agent.scenario.engine.ScenarioEngine;
 import org.bench4q.share.helper.MarshalHelper;
 import org.bench4q.share.models.agent.BehaviorBriefModel;
 import org.bench4q.share.models.agent.BehaviorStatusCodeResultModel;
@@ -97,7 +97,7 @@ public class TestController {
 			return null;
 		}
 	}
-	
+
 	private RunScenarioResultModel buildWith(UUID runId) {
 		RunScenarioResultModel result = new RunScenarioResultModel();
 		result.setRunId(runId);
@@ -267,7 +267,8 @@ public class TestController {
 		return new CleanTestResultModel(true);
 	}
 
-	@RequestMapping(value = "/updatePopulation/{runId}/{requiredLoad}", method = RequestMethod.POST)
+	@RequestMapping(value = "/updatePopulation/{runId}/{requiredLoad}", method = {
+			RequestMethod.POST, RequestMethod.GET })
 	@ResponseBody
 	public UpdatePopulationModel updatePopulation(@PathVariable UUID runId,
 			@PathVariable int requiredLoad) {
diff --git a/Bench4Q-Agent/src/main/java/org/bench4q/agent/datacollector/DataCollector.java b/Bench4Q-Agent/src/main/java/org/bench4q/agent/datacollector/DataCollector.java
index 94c13c9f..1e1a073a 100644
--- a/Bench4Q-Agent/src/main/java/org/bench4q/agent/datacollector/DataCollector.java
+++ b/Bench4Q-Agent/src/main/java/org/bench4q/agent/datacollector/DataCollector.java
@@ -3,8 +3,8 @@ package org.bench4q.agent.datacollector;
 import java.util.Map;
 
 import org.bench4q.agent.datacollector.impl.BehaviorStatusCodeResult;
-import org.bench4q.agent.scenario.BehaviorResult;
-import org.bench4q.agent.scenario.PageResult;
+import org.bench4q.agent.scenario.engine.BehaviorResult;
+import org.bench4q.agent.scenario.engine.PageResult;
 
 public interface DataCollector {
 	public void add(BehaviorResult behaviorResult);
diff --git a/Bench4Q-Agent/src/main/java/org/bench4q/agent/datacollector/impl/AbstractDataCollector.java b/Bench4Q-Agent/src/main/java/org/bench4q/agent/datacollector/impl/AbstractDataCollector.java
index 6f846ac7..1ab0ed1d 100644
--- a/Bench4Q-Agent/src/main/java/org/bench4q/agent/datacollector/impl/AbstractDataCollector.java
+++ b/Bench4Q-Agent/src/main/java/org/bench4q/agent/datacollector/impl/AbstractDataCollector.java
@@ -7,7 +7,7 @@ import java.util.concurrent.Executors;
 import org.bench4q.agent.Main;
 import org.bench4q.agent.datacollector.DataCollector;
 import org.bench4q.agent.helper.ApplicationContextHelper;
-import org.bench4q.agent.scenario.BehaviorResult;
+import org.bench4q.agent.scenario.engine.BehaviorResult;
 import org.bench4q.agent.storage.StorageHelper;
 import org.bench4q.share.models.agent.BehaviorResultModel;
 
diff --git a/Bench4Q-Agent/src/main/java/org/bench4q/agent/datacollector/impl/PageResultCollector.java b/Bench4Q-Agent/src/main/java/org/bench4q/agent/datacollector/impl/PageResultCollector.java
index f046c746..e75b5a30 100644
--- a/Bench4Q-Agent/src/main/java/org/bench4q/agent/datacollector/impl/PageResultCollector.java
+++ b/Bench4Q-Agent/src/main/java/org/bench4q/agent/datacollector/impl/PageResultCollector.java
@@ -4,8 +4,8 @@ import java.util.Date;
 import java.util.HashMap;
 import java.util.Map;
 
-import org.bench4q.agent.scenario.BehaviorResult;
-import org.bench4q.agent.scenario.PageResult;
+import org.bench4q.agent.scenario.engine.BehaviorResult;
+import org.bench4q.agent.scenario.engine.PageResult;
 import org.bench4q.share.models.agent.statistics.AgentPageBriefModel;
 
 public class PageResultCollector extends AbstractDataCollector {
diff --git a/Bench4Q-Agent/src/main/java/org/bench4q/agent/datacollector/impl/ScenarioResultCollector.java b/Bench4Q-Agent/src/main/java/org/bench4q/agent/datacollector/impl/ScenarioResultCollector.java
index 53b44994..f58328b6 100644
--- a/Bench4Q-Agent/src/main/java/org/bench4q/agent/datacollector/impl/ScenarioResultCollector.java
+++ b/Bench4Q-Agent/src/main/java/org/bench4q/agent/datacollector/impl/ScenarioResultCollector.java
@@ -7,8 +7,8 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.UUID;
 
-import org.bench4q.agent.scenario.BehaviorResult;
-import org.bench4q.agent.scenario.PageResult;
+import org.bench4q.agent.scenario.engine.BehaviorResult;
+import org.bench4q.agent.scenario.engine.PageResult;
 import org.bench4q.share.models.agent.statistics.AgentBriefStatusModel;
 
 /**
diff --git a/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/MongoDB/ui.xml b/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/MongoDB/ui.xml
index 59938883..24a18fb0 100644
--- a/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/MongoDB/ui.xml
+++ b/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/MongoDB/ui.xml
@@ -3,30 +3,30 @@
 <ui>
 	<plugin name="MongoDBPlugin">
 		<params>
-			<param name="hostName" label="hostName">
+			<param name="hostName" label="hostName" required="true">
 				<field size="7" />
 			</param>
-			<param name="port" label="port">
+			<param name="port" label="port" required="true">
 				<field size="7" />
 			</param>
-			<param name="dbname" label="dbname">
+			<param name="dbname" label="dbname" required="true">
 				<field size="7" />
 			</param>
 		</params>
 	</plugin>
 	<behavior name="Insert">
 		<params>
-			<param name="key" label="key">
+			<param name="key" label="key" required="true">
 				<field size="7" />
 			</param>
-			<param name="value" label="value">
+			<param name="value" label="value" required="true">
 				<field size="7" />
 			</param>
 		</params>
 	</behavior>
 	<behavior name="Query">
 		<params>
-			<param name="properties" label="properties">
+			<param name="properties" label="properties" required="true">
 				<table cols="propertyName;propertyValue" />
 			</param>
 		</params>
diff --git a/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/comandline/ui.xml b/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/comandline/ui.xml
index 5093e5af..f2e622d0 100644
--- a/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/comandline/ui.xml
+++ b/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/comandline/ui.xml
@@ -6,7 +6,7 @@
 	</plugin>
 	<behavior name="Command">
 		<params>
-			<param name="command">
+			<param name="command" required="true">
 				<field size="6"></field>
 			</param>
 		</params>
diff --git a/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/context/ui.xml b/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/context/ui.xml
index f557275b..ab5778e7 100644
--- a/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/context/ui.xml
+++ b/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/context/ui.xml
@@ -6,7 +6,7 @@
 	</plugin>
 	<control name="Set">
 		<params>
-			<param name="toSave">
+			<param name="toSave" required="true">
 				<field size="7"></field>
 			</param>
 		</params>
diff --git a/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/http/ui.xml b/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/http/ui.xml
index 00a8d872..305abc93 100644
--- a/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/http/ui.xml
+++ b/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/http/ui.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
- <!DOCTYPE ui SYSTEM "../../dtd/ui.dtd">
+ <!-- <!DOCTYPE ui SYSTEM "../../dtd/ui.dtd"> -->
 <ui>
 	<plugin name="Http">
 		<params>
@@ -7,7 +7,7 @@
 	</plugin>
 	<behavior name="Get">
 		<params>
-			<param name="url" label="The Url to request!!!!!!" required="true">
+			<param name="url" label="The Url to request" required="true">
 				<field size="7" />
 			</param>
 			<param name="queryParams" label="The query params of this request" required="false">
diff --git a/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/iterator/ui.xml b/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/iterator/ui.xml
index 10a0caee..0ded9f1c 100644
--- a/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/iterator/ui.xml
+++ b/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/iterator/ui.xml
@@ -3,10 +3,11 @@
 <ui>
 	<plugin name="IteratorNumber">
 		<params>
-			<param name="begin" label="The Beginning of the Iteration">
+			<param name="begin" label="The Beginning of the Iteration"
+				required="true">
 				<field size="5"></field>
 			</param>
-			<param name="format" label="The format of the value">
+			<param name="format" label="The format of the value" required="false">
 				<field size="5"></field>
 			</param>
 		</params>
diff --git a/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/log/ui.xml b/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/log/ui.xml
index b20dda6d..deb33bb5 100644
--- a/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/log/ui.xml
+++ b/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/log/ui.xml
@@ -6,7 +6,7 @@
 	</plugin>
 	<behavior name="Log">
 		<params>
-			<param name="message">
+			<param name="message" required="true">
 				<field size="4" />
 			</param>
 		</params>
diff --git a/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/random/ui.xml b/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/random/ui.xml
index 1241609d..2b87c5b4 100644
--- a/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/random/ui.xml
+++ b/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/random/ui.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE ui SYSTEM "../../dtd/ui.dtd">
+<!-- <!DOCTYPE ui SYSTEM "../../dtd/ui.dtd"> -->
 <ui>
 	<plugin name="Random">
 		<params>
diff --git a/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/timer/ui.xml b/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/timer/ui.xml
index cfe45b9e..632ba265 100644
--- a/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/timer/ui.xml
+++ b/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/timer/ui.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE ui SYSTEM "../../dtd/ui.dtd">
+<!-- <!DOCTYPE ui SYSTEM "../../dtd/ui.dtd"> -->
 <ui>
 	<plugin name="ConstantTimer">
 		<params />
diff --git a/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/unique/ui.xml b/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/unique/ui.xml
index b60efd8c..05a5b33b 100644
--- a/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/unique/ui.xml
+++ b/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/basic/unique/ui.xml
@@ -3,10 +3,11 @@
 <ui>
 	<plugin name="UniqueNumber">
 		<params>
-			<param name="begin" label="The Beginning of the Iteration">
+			<param name="begin" label="The Beginning of the Iteration"
+				required="true">
 				<field size="5"></field>
 			</param>
-			<param name="format" label="The format of the value">
+			<param name="format" label="The format of the value" required="true">
 				<field size="5"></field>
 			</param>
 		</params>
diff --git a/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/dtd/ui.dtd b/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/dtd/ui.dtd
index 4ef7cc6a..dcb0b45d 100644
--- a/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/dtd/ui.dtd
+++ b/Bench4Q-Agent/src/main/java/org/bench4q/agent/plugin/dtd/ui.dtd
@@ -20,7 +20,7 @@
 <!ATTLIST param 
   name     CDATA         #REQUIRED
   label    CDATA         #IMPLIED
-  required     CDATA         #REQUIRED
+  required CDATA         #REQUIRED
 >
 <!ELEMENT group (param|group)*>
 <!ATTLIST group 
diff --git a/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/BehaviorResult.java b/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/engine/BehaviorResult.java
similarity index 98%
rename from Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/BehaviorResult.java
rename to Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/engine/BehaviorResult.java
index 9f4b502b..8c1bf6f5 100644
--- a/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/BehaviorResult.java
+++ b/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/engine/BehaviorResult.java
@@ -1,4 +1,4 @@
-package org.bench4q.agent.scenario;
+package org.bench4q.agent.scenario.engine;
 
 import java.util.Date;
 
diff --git a/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/PageResult.java b/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/engine/PageResult.java
similarity index 98%
rename from Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/PageResult.java
rename to Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/engine/PageResult.java
index 7ca0513d..c8e1e64c 100644
--- a/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/PageResult.java
+++ b/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/engine/PageResult.java
@@ -1,4 +1,4 @@
-package org.bench4q.agent.scenario;
+package org.bench4q.agent.scenario.engine;
 
 import java.util.ArrayList;
 import java.util.List;
diff --git a/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/ScenarioContext.java b/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/engine/ScenarioContext.java
similarity index 70%
rename from Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/ScenarioContext.java
rename to Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/engine/ScenarioContext.java
index dd3e07d7..f742ebcd 100644
--- a/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/ScenarioContext.java
+++ b/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/engine/ScenarioContext.java
@@ -1,14 +1,17 @@
-package org.bench4q.agent.scenario;
+package org.bench4q.agent.scenario.engine;
 
 import java.util.Date;
 import java.util.UUID;
-import java.util.concurrent.SynchronousQueue;
+import java.util.concurrent.ArrayBlockingQueue;
 import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.ThreadPoolExecutor.DiscardPolicy;
 
+import org.apache.log4j.Logger;
 import org.bench4q.agent.datacollector.DataCollector;
 import org.bench4q.agent.datacollector.impl.ScenarioResultCollector;
+import org.bench4q.agent.plugin.PluginManager;
+import org.bench4q.agent.scenario.Scenario;
 
 public class ScenarioContext {
 	private static final long keepAliveTime = 10;
@@ -19,6 +22,7 @@ public class ScenarioContext {
 	private Scenario scenario;
 	private boolean finished;
 	private DataCollector dataStatistics;
+	private PluginManager pluginManager;
 
 	public UUID getTestId() {
 		return testId;
@@ -76,29 +80,32 @@ public class ScenarioContext {
 		this.dataStatistics = dataStatistics;
 	}
 
+	private PluginManager getPluginManager() {
+		return pluginManager;
+	}
+
+	private void setPluginManager(PluginManager pluginManager) {
+		this.pluginManager = pluginManager;
+	}
+
 	private ScenarioContext() {
 	}
 
 	public static ScenarioContext buildScenarioContext(UUID testId,
-			final Scenario scenario, int poolSize) {
-		ScenarioContext scenarioContext = new ScenarioContext();
-		scenarioContext.setTestId(testId);
-		final SynchronousQueue<Runnable> workQueue = new SynchronousQueue<Runnable>();
-		ThreadPoolExecutor executor = new ThreadPoolExecutor(poolSize,
-				poolSize, keepAliveTime, TimeUnit.MINUTES, workQueue,
-				new DiscardPolicy());
+			final Scenario scenario, int poolSize, PluginManager pluginManager) {
+		ScenarioContext scenarioContext = buildScenarioContextWithoutScenario(
+				testId, poolSize, pluginManager);
 		scenarioContext.setScenario(scenario);
-		scenarioContext.setStartDate(new Date(System.currentTimeMillis()));
-		scenarioContext.setExecutorService(executor);
-		scenarioContext.setDataStatistics(new ScenarioResultCollector(testId));
 		return scenarioContext;
 	}
 
 	public static ScenarioContext buildScenarioContextWithoutScenario(
-			UUID testId, int poolSize) {
+			UUID testId, int poolSize, PluginManager pluginManager) {
 		ScenarioContext scenarioContext = new ScenarioContext();
 		scenarioContext.setTestId(testId);
-		final SynchronousQueue<Runnable> workQueue = new SynchronousQueue<Runnable>();
+		scenarioContext.setPluginManager(pluginManager);
+		final ArrayBlockingQueue<Runnable> workQueue = new ArrayBlockingQueue<Runnable>(
+				poolSize);
 		ThreadPoolExecutor executor = new ThreadPoolExecutor(poolSize,
 				poolSize, keepAliveTime, TimeUnit.MINUTES, workQueue,
 				new DiscardPolicy());
@@ -125,4 +132,18 @@ public class ScenarioContext {
 		this.getExecutor().setMaximumPoolSize(requiredLoad);
 	}
 
+	public void addTask() {
+		if (this.isFinished()) {
+			return;
+		}
+		this.getExecutor().execute(new VUser(this, 1, getPluginManager()));
+		Logger.getLogger(this.getClass()).info(
+				this.getExecutor().getActiveCount());
+	}
+
+	public void initTasks() {
+		for (int i = 0; i < this.getExecutor().getCorePoolSize(); i++) {
+			addTask();
+		}
+	}
 }
diff --git a/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/ScenarioEngine.java b/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/engine/ScenarioEngine.java
similarity index 73%
rename from Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/ScenarioEngine.java
rename to Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/engine/ScenarioEngine.java
index a127e8b3..a9d3b0f9 100644
--- a/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/ScenarioEngine.java
+++ b/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/engine/ScenarioEngine.java
@@ -1,13 +1,11 @@
-package org.bench4q.agent.scenario;
+package org.bench4q.agent.scenario.engine;
 
 import java.util.HashMap;
 import java.util.Map;
 import java.util.UUID;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-
 import org.apache.log4j.Logger;
 import org.bench4q.agent.plugin.PluginManager;
+import org.bench4q.agent.scenario.Scenario;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Component;
 
@@ -41,7 +39,8 @@ public class ScenarioEngine {
 	public void addRunningTestWithoutScenario(UUID runId, int poolSize) {
 		try {
 			final ScenarioContext scenarioContext = ScenarioContext
-					.buildScenarioContextWithoutScenario(runId, poolSize);
+					.buildScenarioContextWithoutScenario(runId, poolSize,
+							getPluginManager());
 			this.getRunningTests().put(runId, scenarioContext);
 		} catch (Exception e) {
 			e.printStackTrace();
@@ -61,28 +60,15 @@ public class ScenarioEngine {
 			return false;
 		}
 		final ScenarioContext context = this.getRunningTests().get(runId);
-		return runWith(context, runId);
+		return runWith(context);
 	}
 
-	private boolean runWith(final ScenarioContext scenarioContext,
-			final UUID runId) {
+	private boolean runWith(final ScenarioContext scenarioContext) {
 		if (scenarioContext == null) {
 			logger.error("The context required is null");
 			return false;
 		}
-		ExecutorService taskMaker = Executors.newSingleThreadExecutor();
-
-		taskMaker.execute(new Runnable() {
-			public void run() {
-				int currentIterationId = 0;
-				while (!scenarioContext.isFinished()) {
-					scenarioContext.getExecutor().execute(
-							new VUser(scenarioContext, currentIterationId,
-									getPluginManager()));
-					currentIterationId++;
-				}
-			}
-		});
+		scenarioContext.initTasks();
 		return true;
 	}
 
diff --git a/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/engine/TaskMonitor.java b/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/engine/TaskMonitor.java
new file mode 100644
index 00000000..3f4adc0a
--- /dev/null
+++ b/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/engine/TaskMonitor.java
@@ -0,0 +1,26 @@
+package org.bench4q.agent.scenario.engine;
+
+public class TaskMonitor {
+
+	public static class TaskProducer implements Runnable {
+		private ScenarioContext context;
+
+		public TaskProducer(ScenarioContext context) {
+			this.context = context;
+		}
+
+		@Override
+		public void run() {
+			int poolSize = context.getExecutor().getCorePoolSize();
+			try {
+				if (context.getExecutor().getTaskCount() > poolSize * 2) {
+					this.wait();
+				}
+			} catch (Exception e) {
+
+			} finally {
+
+			}
+		}
+	}
+}
diff --git a/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/VUser.java b/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/engine/VUser.java
similarity index 95%
rename from Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/VUser.java
rename to Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/engine/VUser.java
index 4f4dee4c..4d158553 100644
--- a/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/VUser.java
+++ b/Bench4Q-Agent/src/main/java/org/bench4q/agent/scenario/engine/VUser.java
@@ -1,4 +1,4 @@
-package org.bench4q.agent.scenario;
+package org.bench4q.agent.scenario.engine;
 
 import java.util.Date;
 import java.util.HashMap;
@@ -12,6 +12,11 @@ import org.bench4q.agent.plugin.Plugin;
 import org.bench4q.agent.plugin.PluginManager;
 import org.bench4q.agent.plugin.basic.PluginReturn;
 import org.bench4q.agent.plugin.basic.http.HttpReturn;
+import org.bench4q.agent.scenario.Batch;
+import org.bench4q.agent.scenario.Page;
+import org.bench4q.agent.scenario.Parameter;
+import org.bench4q.agent.scenario.Scenario;
+import org.bench4q.agent.scenario.UsePlugin;
 import org.bench4q.agent.scenario.behavior.Behavior;
 import org.bench4q.agent.scenario.dfa.ParamPart;
 
@@ -58,6 +63,7 @@ public class VUser implements Runnable {
 	}
 
 	private void doCleanUp() {
+		this.getScenarioContext().addTask();
 		this.setScenarioContext(null);
 	}
 
diff --git a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/TestBase.java b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/TestBase.java
index ccde802d..874f90a9 100644
--- a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/TestBase.java
+++ b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/TestBase.java
@@ -10,8 +10,8 @@ import org.apache.commons.io.FileUtils;
 import org.bench4q.agent.plugin.ParameterBarn;
 import org.bench4q.agent.plugin.PluginManager;
 import org.bench4q.agent.scenario.Scenario;
-import org.bench4q.agent.scenario.ScenarioContext;
-import org.bench4q.agent.scenario.VUser;
+import org.bench4q.agent.scenario.engine.ScenarioContext;
+import org.bench4q.agent.scenario.engine.VUser;
 import org.bench4q.share.helper.TestHelper;
 import org.bench4q.share.models.agent.ParameterModel;
 import org.bench4q.share.models.agent.RunScenarioModel;
@@ -111,6 +111,6 @@ public abstract class TestBase {
 
 	public VUser createVUser(Scenario scenario, UUID testId) {
 		return new VUser(ScenarioContext.buildScenarioContext(testId, scenario,
-				10), 1, this.getPluginManager());
+				10, pluginManager), 1, this.getPluginManager());
 	}
 }
diff --git a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/TestWithScriptFile.java b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/TestWithScriptFile.java
index c610ca04..f929c8ff 100644
--- a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/TestWithScriptFile.java
+++ b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/TestWithScriptFile.java
@@ -62,7 +62,7 @@ public class TestWithScriptFile {
 
 	public TestWithScriptFile() {
 		this.setFilePath("Scripts" + System.getProperty("file.separator")
-				+ "httpWithoutTimer.xml");
+				+ "homepage.xml");
 		this.setHttpRequester(new HttpRequester());
 	}
 
@@ -193,7 +193,7 @@ public class TestWithScriptFile {
 		files.add(new File("Scripts" + System.getProperty("file.separator")
 				+ "testJD.xml"));
 		HttpResponse httpResponse1 = this.getHttpRequester().sendPost(
-				url + "/bookTest/10", null, null);
+				url + "/bookTest/100", null, null);
 		RunScenarioResultModel bookResponse = (RunScenarioResultModel) MarshalHelper
 				.tryUnmarshal(RunScenarioResultModel.class,
 						httpResponse1.getContent());
diff --git a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/datastatistics/DetailStatisticsTest.java b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/datastatistics/DetailStatisticsTest.java
index ca586ba9..f5bebd3d 100644
--- a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/datastatistics/DetailStatisticsTest.java
+++ b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/datastatistics/DetailStatisticsTest.java
@@ -9,7 +9,7 @@ import java.util.UUID;
 import org.bench4q.agent.datacollector.DataCollector;
 import org.bench4q.agent.datacollector.impl.ScenarioResultCollector;
 import org.bench4q.agent.datacollector.impl.BehaviorStatusCodeResult;
-import org.bench4q.agent.scenario.BehaviorResult;
+import org.bench4q.agent.scenario.engine.BehaviorResult;
 import org.bench4q.agent.storage.StorageHelper;
 import org.junit.Test;
 import org.springframework.context.ApplicationContext;
diff --git a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/datastatistics/PageResultStatisticsTest.java b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/datastatistics/PageResultStatisticsTest.java
index 2aa57c88..671bf4ea 100644
--- a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/datastatistics/PageResultStatisticsTest.java
+++ b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/datastatistics/PageResultStatisticsTest.java
@@ -2,7 +2,7 @@ package org.bench4q.agent.test.datastatistics;
 
 import org.bench4q.agent.datacollector.DataCollector;
 import org.bench4q.agent.datacollector.impl.PageResultCollector;
-import org.bench4q.agent.scenario.PageResult;
+import org.bench4q.agent.scenario.engine.PageResult;
 import org.bench4q.share.models.agent.statistics.AgentPageBriefModel;
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/datastatistics/ScenarioStatisticsTest.java b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/datastatistics/ScenarioStatisticsTest.java
index 9271b126..b24923d4 100644
--- a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/datastatistics/ScenarioStatisticsTest.java
+++ b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/datastatistics/ScenarioStatisticsTest.java
@@ -9,8 +9,8 @@ import java.util.UUID;
 
 import org.bench4q.agent.datacollector.DataCollector;
 import org.bench4q.agent.datacollector.impl.ScenarioResultCollector;
-import org.bench4q.agent.scenario.BehaviorResult;
-import org.bench4q.agent.scenario.PageResult;
+import org.bench4q.agent.scenario.engine.BehaviorResult;
+import org.bench4q.agent.scenario.engine.PageResult;
 import org.bench4q.agent.storage.StorageHelper;
 import org.bench4q.share.models.agent.statistics.AgentBriefStatusModel;
 import org.junit.Test;
diff --git a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/plugin/Test_ContextPlugin.java b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/plugin/Test_ContextPlugin.java
index 6b3d885f..498964a6 100644
--- a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/plugin/Test_ContextPlugin.java
+++ b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/plugin/Test_ContextPlugin.java
@@ -6,7 +6,7 @@ import java.util.UUID;
 
 import org.bench4q.agent.plugin.basic.context.Context;
 import org.bench4q.agent.scenario.Scenario;
-import org.bench4q.agent.scenario.VUser;
+import org.bench4q.agent.scenario.engine.VUser;
 import org.bench4q.agent.test.TestBase;
 import org.bench4q.share.models.agent.ParameterModel;
 import org.bench4q.share.models.agent.RunScenarioModel;
diff --git a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/plugin/Test_CsvProvider.java b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/plugin/Test_CsvProvider.java
index cf4c6c8b..2c8c55ed 100644
--- a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/plugin/Test_CsvProvider.java
+++ b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/plugin/Test_CsvProvider.java
@@ -13,7 +13,7 @@ import java.util.UUID;
 import org.bench4q.agent.plugin.PluginManager;
 import org.bench4q.agent.plugin.basic.csvprovider.CsvProvider;
 import org.bench4q.agent.scenario.Scenario;
-import org.bench4q.agent.scenario.VUser;
+import org.bench4q.agent.scenario.engine.VUser;
 import org.bench4q.agent.test.TestBase;
 import org.bench4q.share.helper.TestHelper;
 import org.bench4q.share.models.agent.ParameterModel;
diff --git a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/plugin/Test_HttpPlugin.java b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/plugin/Test_HttpPlugin.java
index 97af7505..97ebad8b 100644
--- a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/plugin/Test_HttpPlugin.java
+++ b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/plugin/Test_HttpPlugin.java
@@ -16,7 +16,7 @@ import org.bench4q.agent.plugin.basic.http.BatchRequest;
 import org.bench4q.agent.plugin.basic.http.HttpPlugin;
 import org.bench4q.agent.plugin.basic.http.HttpReturn;
 import org.bench4q.agent.scenario.Scenario;
-import org.bench4q.agent.scenario.VUser;
+import org.bench4q.agent.scenario.engine.VUser;
 import org.bench4q.agent.test.TestBase;
 import org.bench4q.share.helper.MarshalHelper;
 import org.bench4q.share.helper.TestHelper;
diff --git a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/plugin/Test_MongoDBPlugin.java b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/plugin/Test_MongoDBPlugin.java
index 4b5a0ded..627e4f4f 100644
--- a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/plugin/Test_MongoDBPlugin.java
+++ b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/plugin/Test_MongoDBPlugin.java
@@ -12,7 +12,7 @@ import org.apache.commons.io.FileUtils;
 import org.bench4q.agent.plugin.basic.MongoDB.MongoDBPlugin;
 import org.bench4q.agent.plugin.basic.MongoDB.MongoDBReturn;
 import org.bench4q.agent.scenario.Scenario;
-import org.bench4q.agent.scenario.VUser;
+import org.bench4q.agent.scenario.engine.VUser;
 import org.bench4q.agent.test.TestBase;
 import org.bench4q.share.helper.MarshalHelper;
 import org.bench4q.share.helper.TestHelper;
diff --git a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/scenario/Test_ScenarioContext.java b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/scenario/Test_ScenarioContext.java
index 8cf48bc2..737d5416 100644
--- a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/scenario/Test_ScenarioContext.java
+++ b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/scenario/Test_ScenarioContext.java
@@ -5,21 +5,25 @@ import static org.junit.Assert.*;
 import java.util.UUID;
 import java.util.concurrent.TimeUnit;
 
+import org.bench4q.agent.plugin.PluginManager;
 import org.bench4q.agent.scenario.Scenario;
-import org.bench4q.agent.scenario.ScenarioContext;
+import org.bench4q.agent.scenario.engine.ScenarioContext;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 
 @RunWith(SpringJUnit4ClassRunner.class)
 @ContextConfiguration(locations = { "classpath:application-context.xml" })
 public class Test_ScenarioContext {
+	@Autowired
+	private PluginManager pluginManager;
 
 	@Test
 	public void testBuildScenarioContext() {
 		ScenarioContext context = ScenarioContext.buildScenarioContext(
-				UUID.randomUUID(), new Scenario(), 20);
+				UUID.randomUUID(), new Scenario(), 20, this.pluginManager);
 		assertEquals(10,
 				context.getExecutor().getKeepAliveTime(TimeUnit.MINUTES));
 		assertEquals(20, context.getExecutor().getMaximumPoolSize());
diff --git a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/scenario/Test_ScenarioEngine.java b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/scenario/Test_ScenarioEngine.java
index 890fca0d..c66520ae 100644
--- a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/scenario/Test_ScenarioEngine.java
+++ b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/scenario/Test_ScenarioEngine.java
@@ -2,12 +2,16 @@ package org.bench4q.agent.test.scenario;
 
 import static org.junit.Assert.*;
 
+import java.io.File;
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.UUID;
 
+import org.apache.commons.io.FileUtils;
+import org.bench4q.agent.plugin.PluginManager;
 import org.bench4q.agent.scenario.Scenario;
-import org.bench4q.agent.scenario.ScenarioContext;
-import org.bench4q.agent.scenario.ScenarioEngine;
+import org.bench4q.agent.scenario.engine.ScenarioContext;
+import org.bench4q.agent.scenario.engine.ScenarioEngine;
 import org.bench4q.agent.test.TestBase;
 import org.bench4q.share.models.agent.ParameterModel;
 import org.bench4q.share.models.agent.scriptrecord.BehaviorModel;
@@ -22,6 +26,9 @@ import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 @ContextConfiguration(locations = { "classpath:application-context.xml" })
 public class Test_ScenarioEngine extends TestBase {
 	private ScenarioEngine scenarioEngine;
+	private UUID testId = UUID.randomUUID();
+	@Autowired
+	private PluginManager pluginManager;
 
 	private ScenarioEngine getScenarioEngine() {
 		return scenarioEngine;
@@ -34,19 +41,27 @@ public class Test_ScenarioEngine extends TestBase {
 
 	@Test
 	public void test_UpdatePopulation() {
-		UUID testId = UUID.randomUUID();
-		ScenarioContext scenarioContext = ScenarioContext
-				.buildScenarioContext(
-						testId,
-						Scenario.scenarioBuilderWithCompile(buildRunScenarioModelWith(
-								new ArrayList<UsePluginModel>(),
-								BehaviorModel
-										.UserBehaviorBuilder(1, "ok", "http",
-												new ArrayList<ParameterModel>()))),
-						100);
+		ScenarioContext scenarioContext = ScenarioContext.buildScenarioContext(
+				testId,
+				Scenario.scenarioBuilderWithCompile(buildRunScenarioModelWith(
+						new ArrayList<UsePluginModel>(), BehaviorModel
+								.UserBehaviorBuilder(1, "ok", "http",
+										new ArrayList<ParameterModel>()))),
+				100, this.pluginManager);
 		this.getScenarioEngine().getRunningTests().put(testId, scenarioContext);
 		this.getScenarioEngine().updatePopulation(testId, 20);
 		assertEquals(20, scenarioContext.getExecutor().getMaximumPoolSize());
 		System.out.println(scenarioContext.getExecutor().getActiveCount());
 	}
+
+	@Test
+	public void test_RunWithContext() throws IOException {
+		ScenarioContext scenarioContext = ScenarioContext.buildScenarioContext(
+				testId, Scenario.scenarioBuilderWithCompile(FileUtils
+						.readFileToString(new File("Scripts"
+								+ System.getProperty("file.separator")
+								+ "homepage.xml"))), 100, this.pluginManager);
+		this.getScenarioEngine().getRunningTests().put(testId, scenarioContext);
+		this.getScenarioEngine().runWith(testId);
+	}
 }
diff --git a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/scenario/Test_VUser.java b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/scenario/Test_VUser.java
index f949af49..b4bda65a 100644
--- a/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/scenario/Test_VUser.java
+++ b/Bench4Q-Agent/src/test/java/org/bench4q/agent/test/scenario/Test_VUser.java
@@ -9,8 +9,8 @@ import static org.junit.Assert.*;
 
 import org.bench4q.agent.plugin.basic.csvprovider.CsvProvider;
 import org.bench4q.agent.scenario.Scenario;
-import org.bench4q.agent.scenario.VUser;
 import org.bench4q.agent.scenario.behavior.Behavior;
+import org.bench4q.agent.scenario.engine.VUser;
 import org.bench4q.agent.test.TestBase;
 import org.bench4q.share.helper.TestHelper;
 import org.bench4q.share.models.agent.ParameterModel;
diff --git a/Bench4Q-Agent/src/test/resources/application-context.xml b/Bench4Q-Agent/src/test/resources/application-context.xml
index 6013e944..6c72d7ff 100644
--- a/Bench4Q-Agent/src/test/resources/application-context.xml
+++ b/Bench4Q-Agent/src/test/resources/application-context.xml
@@ -5,9 +5,6 @@
 	xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
 		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
 		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
-
-	<context:component-scan
-		base-package="org.bench4q.agent.helper, org.bench4q.agent.plugin, org.bench4q.agent.storage, org.bench4q.agent.parameterization,org.bench4q.agent.scenario" />
+	<context:component-scan base-package="org.bench4q" />
 	<mvc:annotation-driven />
-
 </beans>