diff --git a/pom.xml b/pom.xml
index 3c1ed2b7f..a38f32236 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
     <artifactId>liteflow</artifactId>
     <packaging>jar</packaging>
     <modelVersion>4.0.0</modelVersion>
-    <version>1.2.2</version>
+    <version>1.2.3</version>
 
     <properties>
     	<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
diff --git a/src/main/java/com/thebeastshop/liteflow/core/FlowExecutor.java b/src/main/java/com/thebeastshop/liteflow/core/FlowExecutor.java
index 136b78bbf..f748eb789 100644
--- a/src/main/java/com/thebeastshop/liteflow/core/FlowExecutor.java
+++ b/src/main/java/com/thebeastshop/liteflow/core/FlowExecutor.java
@@ -46,7 +46,7 @@ public class FlowExecutor {
 			try {
 				FlowParser.parseLocal(path);
 			} catch (Exception e) {
-				String errorMsg = MessageFormat.format("init flow executor cause error,cannot parse rule file{}", path);
+				String errorMsg = MessageFormat.format("init flow executor cause error,cannot parse rule file{0}", path);
 				throw new FlowExecutorNotInitException(errorMsg);
 			}
 		}
@@ -57,26 +57,47 @@ public class FlowExecutor {
 	}
 
 	public <T> T execute(String chainId,Object param){
-		return execute(chainId, param, DefaultSlot.class);
+		return execute(chainId, param, DefaultSlot.class,null,false);
 	}
 	
 	public <T> T execute(String chainId,Object param,Class<? extends Slot> slotClazz){
-		int slotIndex = -1;
+		return execute(chainId, param, slotClazz,null,false);
+	}
+	
+	public <T> T invoke(String chainId,Class<? extends Slot> slotClazz,Integer slotIndex){
+		return execute(chainId,null, slotClazz,slotIndex,true);
+	}
+	
+	public <T> T execute(String chainId,Object param,Class<? extends Slot> slotClazz,Integer slotIndex,boolean isInnerChain){
 		try{
+			if(FlowBus.needInit()) {
+				init();
+			}
+			
 			Chain chain = FlowBus.getChain(chainId);
 			
 			if(chain == null){
-				String errorMsg = MessageFormat.format("couldn't find chain with the id[{}]", chainId);
+				String errorMsg = MessageFormat.format("couldn't find chain with the id[{0}]", chainId);
 				throw new ChainNotFoundException(errorMsg);
 			}
 			
-			slotIndex = DataBus.offerSlot(slotClazz);
-			LOG.info("slot[{}] offered",slotIndex);
+			if(!isInnerChain && slotIndex == null) {
+				slotIndex = DataBus.offerSlot(slotClazz);
+				LOG.info("slot[{}] offered",slotIndex);
+			}
+			
 			if(slotIndex == -1){
 				throw new NoAvailableSlotException("there is no available slot");
 			}
 			
-			DataBus.getSlot(slotIndex).setRequestData(param);
+			Slot slot = DataBus.getSlot(slotIndex);
+			if(slot == null) {
+				throw new NoAvailableSlotException("the slot is not exist");
+			}
+			
+			if(!isInnerChain && param != null) {
+				slot.setRequestData(param);
+			}
 			
 			List<Condition> conditionList = chain.getConditionList();
 			
@@ -97,7 +118,7 @@ public class FlowExecutor {
 									break;
 								}
 							}else{
-								String errorMsg = MessageFormat.format("component[{}] do not gain access", component.getClass().getSimpleName());
+								String errorMsg = MessageFormat.format("component[{0}] do not gain access", component.getClass().getSimpleName());
 								throw new ComponentNotAccessException(errorMsg);
 							}
 						}catch(Throwable t){
@@ -116,12 +137,17 @@ public class FlowExecutor {
 					latch.await(15, TimeUnit.SECONDS);
 				}
 			}
-			DataBus.getSlot(slotIndex).printStep();
-			return DataBus.getSlot(slotIndex).getResponseData();
+			if(!isInnerChain) {
+				slot.printStep();
+			}
+			return slot.getResponseData();
 		}catch(Exception e){
+			LOG.error("executor cause error",e);
 			throw new FlowSystemException("executor cause error");
 		}finally{
-			DataBus.releaseSlot(slotIndex);
+			if(!isInnerChain) {
+				DataBus.releaseSlot(slotIndex);
+			}
 		}
 	}
 	
diff --git a/src/main/java/com/thebeastshop/liteflow/core/NodeComponent.java b/src/main/java/com/thebeastshop/liteflow/core/NodeComponent.java
index ca07d8897..a4552a299 100644
--- a/src/main/java/com/thebeastshop/liteflow/core/NodeComponent.java
+++ b/src/main/java/com/thebeastshop/liteflow/core/NodeComponent.java
@@ -15,6 +15,8 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import com.thebeastshop.liteflow.entity.config.Node;
+import com.thebeastshop.liteflow.entity.data.CmpStep;
+import com.thebeastshop.liteflow.entity.data.CmpStepType;
 import com.thebeastshop.liteflow.entity.data.DataBus;
 import com.thebeastshop.liteflow.entity.data.Slot;
 import com.thebeastshop.liteflow.entity.monitor.CompStatistics;
@@ -30,6 +32,7 @@ public abstract class NodeComponent {
 	private String nodeId;
 	
 	public void execute() throws Exception{
+		this.getSlot().addStep(new CmpStep(nodeId, CmpStepType.START));
 		StopWatch stopWatch = new StopWatch();
 		stopWatch.start();
 		long initm=Runtime.getRuntime().freeMemory();
@@ -39,7 +42,7 @@ public abstract class NodeComponent {
 		long timeSpent = stopWatch.getTime();
 		long endm=Runtime.getRuntime().freeMemory();
 		
-		this.getSlot().addStep(nodeId);
+		this.getSlot().addStep(new CmpStep(nodeId, CmpStepType.END));
 		
 		//性能统计
 		CompStatistics statistics = new CompStatistics();
@@ -93,6 +96,10 @@ public abstract class NodeComponent {
 		return this;
 	}
 	
+	public Integer getSlotIndex() {
+		return this.slotIndexTL.get();
+	}
+	
 	public <T extends Slot> T getSlot(){
 		return DataBus.getSlot(this.slotIndexTL.get());
 	}
diff --git a/src/main/java/com/thebeastshop/liteflow/entity/data/AbsSlot.java b/src/main/java/com/thebeastshop/liteflow/entity/data/AbsSlot.java
index 4ed0ff3ea..417d81af5 100644
--- a/src/main/java/com/thebeastshop/liteflow/entity/data/AbsSlot.java
+++ b/src/main/java/com/thebeastshop/liteflow/entity/data/AbsSlot.java
@@ -9,7 +9,10 @@
  */
 package com.thebeastshop.liteflow.entity.data;
 
+import java.util.ArrayDeque;
 import java.util.ArrayList;
+import java.util.Deque;
+import java.util.Iterator;
 import java.util.List;
 import java.util.concurrent.ConcurrentHashMap;
 
@@ -31,7 +34,7 @@ public abstract class AbsSlot implements Slot{
 	
 	private final String NODE_OUTPUT_PREFIX = "output_";
 	
-	private List<String> executeSteps = new ArrayList<String>();
+	private Deque<CmpStep> executeSteps = new ArrayDeque<CmpStep>();
 	
 	protected ConcurrentHashMap<String, Object> dataMap = new ConcurrentHashMap<String, Object>();
 	
@@ -83,15 +86,22 @@ public abstract class AbsSlot implements Slot{
 		return (T)dataMap.get(COND_NODE_PREFIX + key);
 	}
 	
-	public void addStep(String nodeId){
-		this.executeSteps.add(nodeId);
+	public void addStep(CmpStep step){
+		CmpStep lastStep = this.executeSteps.peekLast();
+		if(lastStep != null && lastStep.equals(step)) {
+			lastStep.setStepType(CmpStepType.SINGLE);
+		}else {
+			this.executeSteps.add(step);
+		}
 	}
 	
 	public void printStep(){
 		StringBuffer str = new StringBuffer();
-		for(int i = 0; i < this.executeSteps.size(); i++){
-			str.append(executeSteps.get(i));
-			if(i < this.executeSteps.size()-1){
+		CmpStep cmpStep = null;
+		for (Iterator<CmpStep> it = executeSteps.iterator(); it.hasNext();) {
+			cmpStep = it.next();
+			str.append(cmpStep);
+			if(it.hasNext()){
 				str.append("==>");
 			}
 		}
diff --git a/src/main/java/com/thebeastshop/liteflow/entity/data/CmpStep.java b/src/main/java/com/thebeastshop/liteflow/entity/data/CmpStep.java
new file mode 100644
index 000000000..3076df018
--- /dev/null
+++ b/src/main/java/com/thebeastshop/liteflow/entity/data/CmpStep.java
@@ -0,0 +1,67 @@
+/**
+ * <p>Title: liteFlow</p>
+ * <p>Description: 轻量级的组件式流程框架</p>
+ * <p>Copyright: Copyright (c) 2017</p>
+ * @author Bryan.Zhang
+ * @email weenyc31@163.com
+ * @Date 2017-12-8
+ * @version 1.0
+ */
+package com.thebeastshop.liteflow.entity.data;
+
+import java.text.MessageFormat;
+
+public class CmpStep {
+	private String nodeId;
+	
+	private CmpStepType stepType;
+	
+	public CmpStep(String nodeId, CmpStepType stepType) {
+		this.nodeId = nodeId;
+		this.stepType = stepType;
+	}
+
+	public String getNodeId() {
+		return nodeId;
+	}
+
+	public void setNodeId(String nodeId) {
+		this.nodeId = nodeId;
+	}
+
+	public CmpStepType getStepType() {
+		return stepType;
+	}
+
+	public void setStepType(CmpStepType stepType) {
+		this.stepType = stepType;
+	}
+	
+	@Override
+	public String toString() {
+		if(stepType.equals(CmpStepType.SINGLE)) {
+			return MessageFormat.format("{0}", nodeId);
+		}else {
+			return MessageFormat.format("{0}({1})", nodeId,stepType);
+		}
+		
+		
+	}
+	
+	@Override
+	public boolean equals(Object obj) {
+		if (obj == null) {
+			return false;
+		}else {
+			if(getClass() != obj.getClass()) {
+				return false;
+			}else {
+				if(((CmpStep)obj).getNodeId().equals(this.getNodeId())) {
+					return true;
+				}else {
+					return false;
+				}
+			}
+		}
+	}
+}
diff --git a/src/main/java/com/thebeastshop/liteflow/entity/data/CmpStepType.java b/src/main/java/com/thebeastshop/liteflow/entity/data/CmpStepType.java
new file mode 100644
index 000000000..ba40c63ea
--- /dev/null
+++ b/src/main/java/com/thebeastshop/liteflow/entity/data/CmpStepType.java
@@ -0,0 +1,14 @@
+/**
+ * <p>Title: beast-price</p>
+ * <p>Description: 价格计算服务</p>
+ * <p>Copyright: Copyright (c) 2017</p>
+ * @author Bryan.Zhang
+ * @Date 2017年12月8日
+ */
+package com.thebeastshop.liteflow.entity.data;
+
+public enum CmpStepType {
+	START,
+	END,
+	SINGLE;
+}
diff --git a/src/main/java/com/thebeastshop/liteflow/entity/data/Slot.java b/src/main/java/com/thebeastshop/liteflow/entity/data/Slot.java
index c6e5ca159..c7556439f 100644
--- a/src/main/java/com/thebeastshop/liteflow/entity/data/Slot.java
+++ b/src/main/java/com/thebeastshop/liteflow/entity/data/Slot.java
@@ -34,7 +34,7 @@ public interface Slot {
 	
 	public <T> T getCondResult(String key);
 	
-	public void addStep(String nodeId);
+	public void addStep(CmpStep step);
 	
 	public void printStep();
 }
diff --git a/src/main/java/com/thebeastshop/liteflow/flow/FlowBus.java b/src/main/java/com/thebeastshop/liteflow/flow/FlowBus.java
index 72e142429..d8130c33f 100644
--- a/src/main/java/com/thebeastshop/liteflow/flow/FlowBus.java
+++ b/src/main/java/com/thebeastshop/liteflow/flow/FlowBus.java
@@ -12,6 +12,8 @@ package com.thebeastshop.liteflow.flow;
 import java.util.HashMap;
 import java.util.Map;
 
+import org.apache.commons.collections4.MapUtils;
+
 import com.thebeastshop.liteflow.entity.config.Chain;
 
 public class FlowBus {
@@ -31,4 +33,8 @@ public class FlowBus {
 		}
 		chainMap.put(name, chain);
 	}
+	
+	public static boolean needInit() {
+		return MapUtils.isEmpty(chainMap);
+	}
 }
diff --git a/src/main/java/com/thebeastshop/liteflow/spring/ComponentScaner.java b/src/main/java/com/thebeastshop/liteflow/spring/ComponentScaner.java
index 1249e21cf..81c74891a 100644
--- a/src/main/java/com/thebeastshop/liteflow/spring/ComponentScaner.java
+++ b/src/main/java/com/thebeastshop/liteflow/spring/ComponentScaner.java
@@ -31,6 +31,7 @@ public class ComponentScaner implements BeanPostProcessor, PriorityOrdered {
 		return Ordered.LOWEST_PRECEDENCE;
 	}
 
+	@SuppressWarnings("rawtypes")
 	@Override
 	public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
 		Class clazz = bean.getClass();
diff --git a/src/test/java/com/thebeastshop/liteflow/test/TestMain.java b/src/test/java/com/thebeastshop/liteflow/test/TestMain.java
index 0406f66ae..eb1096cfe 100644
--- a/src/test/java/com/thebeastshop/liteflow/test/TestMain.java
+++ b/src/test/java/com/thebeastshop/liteflow/test/TestMain.java
@@ -17,7 +17,7 @@ import com.thebeastshop.liteflow.parser.FlowParser;
 public class TestMain {
 	public static void main(String[] args) throws Exception {
 		final FlowExecutor executor = new FlowExecutor();
-		executor.setRulePath(Arrays.asList(new String[]{"flow.xml"}));
+		executor.setRulePath(Arrays.asList(new String[]{"config/flow.xml"}));
 		executor.init();
 		
 		for(int i=0;i<1;i++){
diff --git a/src/test/java/com/thebeastshop/liteflow/test/TestWithSpringMain.java b/src/test/java/com/thebeastshop/liteflow/test/TestWithSpringMain.java
index 2a0c459ea..5b9e3560f 100644
--- a/src/test/java/com/thebeastshop/liteflow/test/TestWithSpringMain.java
+++ b/src/test/java/com/thebeastshop/liteflow/test/TestWithSpringMain.java
@@ -25,11 +25,11 @@ public class TestWithSpringMain {
 	public void test1() throws Exception {
 		ExecutorService executorService = Executors.newFixedThreadPool(10);
 		
-		for(int i=0;i<1;i++){
+		for(int i=0;i<10;i++){
 			executorService.submit(new Thread(){
 				@Override
 				public void run() {
-					String response = flowExecutor.execute("chain2", "it's a request");
+					String response = flowExecutor.execute("chain1", "it's a request");
 					System.out.println(response);
 				}
 			});
@@ -37,4 +37,16 @@ public class TestWithSpringMain {
 		System.out.println("done!");
 		System.in.read();
 	}
+	
+	@Test
+	public void test2() throws Exception {
+		try {
+			String response = flowExecutor.execute("chain3", "it's a request");
+			System.out.println(response);
+			System.in.read();
+		}catch(Exception e) {
+			e.printStackTrace();
+		}
+		
+	}
 }
diff --git a/src/test/java/com/thebeastshop/liteflow/test/component/HComponent.java b/src/test/java/com/thebeastshop/liteflow/test/component/HComponent.java
new file mode 100644
index 000000000..f1ab7a653
--- /dev/null
+++ b/src/test/java/com/thebeastshop/liteflow/test/component/HComponent.java
@@ -0,0 +1,32 @@
+/**
+ * <p>Title: liteFlow</p>
+ * <p>Description: 轻量级的组件式流程框架</p>
+ * <p>Copyright: Copyright (c) 2017</p>
+ * @author Bryan.Zhang
+ * @email weenyc31@163.com
+ * @Date 2017-8-1
+ * @version 1.0
+ */
+package com.thebeastshop.liteflow.test.component;
+
+import javax.annotation.Resource;
+
+import org.springframework.stereotype.Component;
+
+import com.thebeastshop.liteflow.core.FlowExecutor;
+import com.thebeastshop.liteflow.core.NodeComponent;
+import com.thebeastshop.liteflow.entity.data.DefaultSlot;
+
+@Component("h")
+public class HComponent extends NodeComponent {
+
+	@Resource
+	private FlowExecutor flowExecutor;
+	
+	@Override
+	public void process() {
+		System.out.println("Hcomponent executed!");
+		flowExecutor.invoke("strategy", DefaultSlot.class, this.getSlotIndex());
+	}
+	
+}
diff --git a/src/test/java/com/thebeastshop/liteflow/test/component/M1Component.java b/src/test/java/com/thebeastshop/liteflow/test/component/M1Component.java
new file mode 100644
index 000000000..9efbb153f
--- /dev/null
+++ b/src/test/java/com/thebeastshop/liteflow/test/component/M1Component.java
@@ -0,0 +1,30 @@
+/**
+ * <p>Title: liteFlow</p>
+ * <p>Description: 轻量级的组件式流程框架</p>
+ * <p>Copyright: Copyright (c) 2017</p>
+ * @author Bryan.Zhang
+ * @email weenyc31@163.com
+ * @Date 2017-8-1
+ * @version 1.0
+ */
+package com.thebeastshop.liteflow.test.component;
+
+import javax.annotation.Resource;
+
+import org.springframework.stereotype.Component;
+
+import com.thebeastshop.liteflow.core.FlowExecutor;
+import com.thebeastshop.liteflow.core.NodeComponent;
+
+@Component("m1")
+public class M1Component extends NodeComponent {
+
+	@Resource
+	private FlowExecutor flowExecutor;
+	
+	@Override
+	public void process() {
+		System.out.println("m1 component executed!");
+	}
+	
+}
diff --git a/src/test/java/com/thebeastshop/liteflow/test/component/M2Component.java b/src/test/java/com/thebeastshop/liteflow/test/component/M2Component.java
new file mode 100644
index 000000000..96a6bf906
--- /dev/null
+++ b/src/test/java/com/thebeastshop/liteflow/test/component/M2Component.java
@@ -0,0 +1,30 @@
+/**
+ * <p>Title: liteFlow</p>
+ * <p>Description: 轻量级的组件式流程框架</p>
+ * <p>Copyright: Copyright (c) 2017</p>
+ * @author Bryan.Zhang
+ * @email weenyc31@163.com
+ * @Date 2017-8-1
+ * @version 1.0
+ */
+package com.thebeastshop.liteflow.test.component;
+
+import javax.annotation.Resource;
+
+import org.springframework.stereotype.Component;
+
+import com.thebeastshop.liteflow.core.FlowExecutor;
+import com.thebeastshop.liteflow.core.NodeComponent;
+
+@Component("m2")
+public class M2Component extends NodeComponent {
+
+	@Resource
+	private FlowExecutor flowExecutor;
+	
+	@Override
+	public void process() {
+		System.out.println("m2 component executed!");
+	}
+	
+}
diff --git a/src/test/java/com/thebeastshop/liteflow/test/component/MComponent.java b/src/test/java/com/thebeastshop/liteflow/test/component/MComponent.java
new file mode 100644
index 000000000..d9267b908
--- /dev/null
+++ b/src/test/java/com/thebeastshop/liteflow/test/component/MComponent.java
@@ -0,0 +1,32 @@
+/**
+ * <p>Title: liteFlow</p>
+ * <p>Description: 轻量级的组件式流程框架</p>
+ * <p>Copyright: Copyright (c) 2017</p>
+ * @author Bryan.Zhang
+ * @email weenyc31@163.com
+ * @Date 2017-8-1
+ * @version 1.0
+ */
+package com.thebeastshop.liteflow.test.component;
+
+import javax.annotation.Resource;
+
+import org.springframework.stereotype.Component;
+
+import com.thebeastshop.liteflow.core.FlowExecutor;
+import com.thebeastshop.liteflow.core.NodeComponent;
+import com.thebeastshop.liteflow.core.NodeCondComponent;
+
+@Component("m")
+public class MComponent extends NodeCondComponent {
+
+	@Resource
+	private FlowExecutor flowExecutor;
+	
+	@Override
+	protected String processCond() throws Exception {
+		System.out.println("m conponent executed");
+		return "m1";
+	}
+	
+}
diff --git a/src/test/resources/config/flow.xml b/src/test/resources/config/flow.xml
index 87fe28548..d29fc2d61 100644
--- a/src/test/resources/config/flow.xml
+++ b/src/test/resources/config/flow.xml
@@ -24,8 +24,10 @@
 	</chain>
 	
 	<chain name="chain3">
-		<then value="a,c,g"/>
-		<when value="b,e"/>
-		<then value="d,f"/>
+		<then value="a,c,h,g"/>
+	</chain>
+	
+	<chain name="strategy">
+		<then value="m(m1|m2)"/>
 	</chain>
 </flow>
\ No newline at end of file
diff --git a/src/test/resources/spring-test.xml b/src/test/resources/spring-test.xml
index 8cc2046d7..685098480 100644
--- a/src/test/resources/spring-test.xml
+++ b/src/test/resources/spring-test.xml
@@ -10,7 +10,7 @@
  	<context:component-scan base-package="com.thebeastshop.liteflow.test.component" />
  	<bean class="com.thebeastshop.liteflow.spring.ComponentScaner"/>
  	
- 	<bean id="flowExecutor" class="com.thebeastshop.liteflow.core.FlowExecutor" init-method="init">
+ 	<bean id="flowExecutor" class="com.thebeastshop.liteflow.core.FlowExecutor">
 		<property name="rulePath">
 			<list>
 				<value>config/flow.xml</value>