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 */ 017 package org.apache.camel.builder; 018 019 import java.util.ArrayList; 020 import java.util.Arrays; 021 import java.util.List; 022 023 import org.apache.camel.CamelContext; 024 import org.apache.camel.Endpoint; 025 import org.apache.camel.Expression; 026 import org.apache.camel.NoSuchEndpointException; 027 import org.apache.camel.model.LoggingLevel; 028 import org.apache.camel.processor.SendProcessor; 029 import org.apache.camel.util.ObjectHelper; 030 import org.apache.commons.logging.Log; 031 import org.apache.commons.logging.LogFactory; 032 033 /** 034 * Base class for implementation inheritance for different clauses in the <a 035 * href="http://activemq.apache.org/camel/dsl.html">Java DSL</a> 036 * 037 * @version $Revision: 69819 $ 038 */ 039 public abstract class BuilderSupport { 040 private CamelContext context; 041 private ErrorHandlerBuilder errorHandlerBuilder; 042 private boolean inheritErrorHandler = true; 043 044 protected BuilderSupport(CamelContext context) { 045 this.context = context; 046 } 047 048 protected BuilderSupport(BuilderSupport parent) { 049 this.context = parent.getContext(); 050 this.inheritErrorHandler = parent.inheritErrorHandler; 051 if (inheritErrorHandler && parent.errorHandlerBuilder != null) { 052 this.errorHandlerBuilder = parent.errorHandlerBuilder.copy(); 053 } 054 } 055 056 // Builder methods 057 // ------------------------------------------------------------------------- 058 059 /** 060 * Returns a value builder for the given header 061 */ 062 public ValueBuilder header(String name) { 063 return Builder.header(name); 064 } 065 066 /** 067 * Returns a predicate and value builder for the inbound body on an exchange 068 */ 069 public ValueBuilder body() { 070 return Builder.body(); 071 } 072 073 /** 074 * Returns a predicate and value builder for the inbound message body as a 075 * specific type 076 */ 077 public <T> ValueBuilder body(Class<T> type) { 078 return Builder.bodyAs(type); 079 } 080 081 /** 082 * Returns a predicate and value builder for the outbound body on an 083 * exchange 084 */ 085 public ValueBuilder outBody() { 086 return Builder.outBody(); 087 } 088 089 /** 090 * Returns a predicate and value builder for the outbound message body as a 091 * specific type 092 */ 093 public <T> ValueBuilder outBody(Class<T> type) { 094 return Builder.outBodyAs(type); 095 } 096 097 /** 098 * Returns a predicate and value builder for the fault body on an 099 * exchange 100 */ 101 public ValueBuilder faultBody() { 102 return Builder.faultBody(); 103 } 104 105 /** 106 * Returns a predicate and value builder for the fault message body as a 107 * specific type 108 */ 109 public <T> ValueBuilder faultBodyAs(Class<T> type) { 110 return Builder.faultBodyAs(type); 111 } 112 113 114 /** 115 * Returns a value builder for the given system property 116 */ 117 public ValueBuilder systemProperty(String name) { 118 return Builder.systemProperty(name); 119 } 120 121 /** 122 * Returns a value builder for the given system property 123 */ 124 public ValueBuilder systemProperty(String name, String defaultValue) { 125 return Builder.systemProperty(name, defaultValue); 126 } 127 128 /** 129 * Returns a constant expression value builder 130 */ 131 public ValueBuilder constant(Object value) { 132 return Builder.constant(value); 133 } 134 135 /** 136 * Returns an expression value builder that replaces all occurrences of the 137 * regular expression with the given replacement 138 */ 139 public ValueBuilder regexReplaceAll(Expression content, String regex, String replacement) { 140 return Builder.regexReplaceAll(content, regex, replacement); 141 } 142 143 /** 144 * Returns an expression value builder that replaces all occurrences of the 145 * regular expression with the given replacement 146 */ 147 public ValueBuilder regexReplaceAll(Expression content, String regex, Expression replacement) { 148 return Builder.regexReplaceAll(content, regex, replacement); 149 } 150 151 /** 152 * Resolves the given URI to an endpoint 153 * 154 * @throws NoSuchEndpointException if the endpoint URI could not be resolved 155 */ 156 public Endpoint endpoint(String uri) throws NoSuchEndpointException { 157 ObjectHelper.notNull(uri, "uri"); 158 Endpoint endpoint = getContext().getEndpoint(uri); 159 if (endpoint == null) { 160 throw new NoSuchEndpointException(uri); 161 } 162 return endpoint; 163 } 164 165 /** 166 * Resolves the given URI to an endpoint of the specified type 167 * 168 * @throws NoSuchEndpointException if the endpoint URI could not be resolved 169 */ 170 public <T extends Endpoint> T endpoint(String uri, Class<T> type) throws NoSuchEndpointException { 171 ObjectHelper.notNull(uri, "uri"); 172 T endpoint = getContext().getEndpoint(uri, type); 173 if (endpoint == null) { 174 throw new NoSuchEndpointException(uri); 175 } 176 return endpoint; 177 } 178 179 /** 180 * Resolves the list of URIs into a list of {@link Endpoint} instances 181 * 182 * @throws NoSuchEndpointException if an endpoint URI could not be resolved 183 */ 184 public List<Endpoint> endpoints(String... uris) throws NoSuchEndpointException { 185 List<Endpoint> endpoints = new ArrayList<Endpoint>(); 186 for (String uri : uris) { 187 endpoints.add(endpoint(uri)); 188 } 189 return endpoints; 190 } 191 192 /** 193 * Helper method to create a list of {@link Endpoint} instances 194 */ 195 public List<Endpoint> endpoints(Endpoint... endpoints) { 196 List<Endpoint> answer = new ArrayList<Endpoint>(); 197 answer.addAll(Arrays.asList(endpoints)); 198 return answer; 199 } 200 201 /** 202 * Creates a disabled error handler for removing the default error handler 203 */ 204 public NoErrorHandlerBuilder noErrorHandler() { 205 return new NoErrorHandlerBuilder(); 206 } 207 208 /** 209 * Creates an error handler which just logs errors 210 */ 211 public LoggingErrorHandlerBuilder loggingErrorHandler() { 212 return new LoggingErrorHandlerBuilder(); 213 } 214 215 /** 216 * Creates an error handler which just logs errors 217 */ 218 public LoggingErrorHandlerBuilder loggingErrorHandler(String log) { 219 return loggingErrorHandler(LogFactory.getLog(log)); 220 } 221 222 /** 223 * Creates an error handler which just logs errors 224 */ 225 public LoggingErrorHandlerBuilder loggingErrorHandler(Log log) { 226 return new LoggingErrorHandlerBuilder(log); 227 } 228 229 /** 230 * Creates an error handler which just logs errors 231 */ 232 public LoggingErrorHandlerBuilder loggingErrorHandler(Log log, LoggingLevel level) { 233 return new LoggingErrorHandlerBuilder(log, level); 234 } 235 236 public DeadLetterChannelBuilder deadLetterChannel() { 237 return new DeadLetterChannelBuilder(); 238 } 239 240 public DeadLetterChannelBuilder deadLetterChannel(String deadLetterUri) { 241 return deadLetterChannel(endpoint(deadLetterUri)); 242 } 243 244 public DeadLetterChannelBuilder deadLetterChannel(Endpoint deadLetterEndpoint) { 245 return new DeadLetterChannelBuilder(new SendProcessor(deadLetterEndpoint)); 246 } 247 248 // Properties 249 // ------------------------------------------------------------------------- 250 public CamelContext getContext() { 251 return context; 252 } 253 254 public void setContext(CamelContext context) { 255 this.context = context; 256 } 257 258 public ErrorHandlerBuilder getErrorHandlerBuilder() { 259 if (errorHandlerBuilder == null) { 260 errorHandlerBuilder = createErrorHandlerBuilder(); 261 } 262 return errorHandlerBuilder; 263 } 264 265 protected ErrorHandlerBuilder createErrorHandlerBuilder() { 266 if (isInheritErrorHandler()) { 267 return new DeadLetterChannelBuilder(); 268 } else { 269 return new NoErrorHandlerBuilder(); 270 } 271 } 272 273 /** 274 * Sets the error handler to use with processors created by this builder 275 */ 276 public void setErrorHandlerBuilder(ErrorHandlerBuilder errorHandlerBuilder) { 277 this.errorHandlerBuilder = errorHandlerBuilder; 278 } 279 280 public boolean isInheritErrorHandler() { 281 return inheritErrorHandler; 282 } 283 284 public void setInheritErrorHandler(boolean inheritErrorHandler) { 285 this.inheritErrorHandler = inheritErrorHandler; 286 } 287 }