Add a new ability to ServiceStarter, about finding a started service instance.

skywalking-sniffer/skywalking-api/src/main/java/com/a/eye/skywalking/api/boot/ServiceStarter.java

@@ -2,7 +2,9 @@ package com.a.eye.skywalking.api.boot;
 
 import com.a.eye.skywalking.logging.ILog;
 import com.a.eye.skywalking.logging.LogManager;
+import java.util.HashMap;
 import java.util.Iterator;
+import java.util.Map;
 import java.util.ServiceLoader;
 
 /**
@@ -16,15 +18,18 @@ public enum ServiceStarter {
 
     private static ILog logger = LogManager.getLogger(StatusBootService.class);
     private volatile boolean isStarted = false;
+    private Map<Class, BootService> bootedServices;
 
     public void boot() {
-        while (!isStarted) {
+        if (!isStarted) {
             try {
+                bootedServices = new HashMap<>();
                 Iterator<BootService> serviceIterator = load().iterator();
                 while (serviceIterator.hasNext()) {
                     BootService bootService = serviceIterator.next();
                     try {
                         bootService.bootUp();
+                        bootedServices.put(bootService.getClass(), bootService);
                     } catch (Exception e) {
                         logger.error(e, "ServiceStarter try to start [{}] fail.", bootService.getClass().getName());
                     }
@@ -35,6 +40,16 @@ public enum ServiceStarter {
         }
     }
 
+    /**
+     * Find a {@link BootService} implementation, which is already started.
+     * @param serviceClass class name.
+     * @param <T> {@link BootService} implementation class.
+     * @return {@link BootService} instance
+     */
+    public <T extends BootService> T findService(Class<T> serviceClass){
+        return (T)bootedServices.get(serviceClass);
+    }
+
     ServiceLoader<BootService> load() {
         return ServiceLoader.load(BootService.class);
     }

skywalking-sniffer/skywalking-api/src/main/java/com/a/eye/skywalking/api/client/CollectorClientService.java

+package com.a.eye.skywalking.api.client;
+
+import com.a.eye.skywalking.api.boot.BootService;
+
+/**
+ * @author wusheng
+ */
+public class CollectorClientService implements BootService {
+    @Override
+    public void bootUp() {
+
+    }
+}

skywalking-sniffer/skywalking-toolkit-activation/skywalking-toolkit-logback-1.x-activation/src/main/java/com/a/eye/skywalking/toolkit/activation/log/logback/v1/x/LogbackPatternConverterActivation.java

@@ -47,7 +47,7 @@ public class LogbackPatternConverterActivation extends ClassInstanceMethodsEnhan
 
             @Override
             public String getMethodsInterceptor() {
-                return "com.a.eye.skywalking.toolkit.log.logback.v1.x.PrintTraceIdInterceptor";
+                return "com.a.eye.skywalking.toolkit.activation.log.logback.v1.x.PrintTraceIdInterceptor";
             }
         }};
     }