001/** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.camel.blueprint; 018 019import java.io.PrintWriter; 020import java.io.StringWriter; 021import java.util.Map; 022 023import org.apache.karaf.bundle.core.BundleState; 024import org.apache.karaf.bundle.core.BundleStateService; 025import org.osgi.framework.Bundle; 026import org.osgi.framework.BundleContext; 027import org.osgi.framework.ServiceRegistration; 028 029/** 030 * A service for Karaf to get extended Bundle information related to Camel Context(s) declared in Blueprint 031 * container. 032 */ 033public class KarafBundleStateService implements BundleStateService { 034 035 BlueprintCamelStateService camelStateService; 036 037 public KarafBundleStateService(BlueprintCamelStateService camelStateService) { 038 this.camelStateService = camelStateService; 039 } 040 041 @Override 042 public String getName() { 043 return "Camel Blueprint"; 044 } 045 046 @Override 047 public String getDiag(Bundle bundle) { 048 if (getState(bundle) == BundleState.Failure) { 049 // return stacktraces for failed camel contexts 050 Map<String, Throwable> exceptions = camelStateService.getExceptions(bundle); 051 StringWriter sw = new StringWriter(); 052 for (String contextId : exceptions.keySet()) { 053 sw.append("Camel context \"").append(contextId).append("\"\n"); 054 Throwable t = exceptions.get(contextId); 055 if (t instanceof NullPointerException) { 056 sw.append("Exception: NullPointerException\n"); 057 } else if (t.getMessage() != null) { 058 sw.append("Exception: ").append(t.getMessage()).append("\n"); 059 } 060 t.printStackTrace(new PrintWriter(sw)); 061 sw.append("\n"); 062 } 063 return sw.toString(); 064 } 065 return null; 066 } 067 068 @Override 069 public BundleState getState(Bundle bundle) { 070 BundleState effective = BundleState.Unknown; 071 for (BlueprintCamelStateService.State s : camelStateService.getStates(bundle)) { 072 if (effective == BundleState.Unknown || s == BlueprintCamelStateService.State.Failure) { 073 switch (s) { 074 case Starting: 075 effective = BundleState.Starting; 076 break; 077 case Active: 078 effective = BundleState.Active; 079 break; 080 case Failure: 081 effective = BundleState.Failure; 082 break; 083 default: 084 break; 085 } 086 } 087 } 088 return effective; 089 } 090 091 public ServiceRegistration<?> register(BundleContext context) { 092 return context.registerService(BundleStateService.class, this, null); 093 } 094 095}