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package org.apache.camel.builder; |
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import org.apache.camel.Endpoint; |
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import org.apache.camel.Exchange; |
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import org.apache.camel.Expression; |
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import org.apache.camel.Predicate; |
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import org.apache.camel.Processor; |
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import org.apache.camel.Route; |
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import org.apache.camel.impl.EventDrivenConsumerRoute; |
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import org.apache.camel.processor.CompositeProcessor; |
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import org.apache.camel.processor.DelegateProcessor; |
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import org.apache.camel.processor.MulticastProcessor; |
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import org.apache.camel.processor.Pipeline; |
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import org.apache.camel.processor.RecipientList; |
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import org.apache.camel.processor.idempotent.IdempotentConsumer; |
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import org.apache.camel.processor.idempotent.MessageIdRepository; |
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import org.apache.camel.spi.Policy; |
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import org.apache.commons.logging.Log; |
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import org.apache.commons.logging.LogFactory; |
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import java.util.ArrayList; |
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import java.util.Collection; |
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import java.util.Collections; |
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import java.util.List; |
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public class FromBuilder extends BuilderSupport implements ProcessorFactory { |
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public static final String DEFAULT_TRACE_CATEGORY = "org.apache.camel.TRACE"; |
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private RouteBuilder builder; |
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private Endpoint from; |
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private List<Processor> processors = new ArrayList<Processor>(); |
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private List<ProcessorFactory> processFactories = new ArrayList<ProcessorFactory>(); |
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private FromBuilder routeBuilder; |
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public FromBuilder(RouteBuilder builder, Endpoint from) { |
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super(builder); |
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this.builder = builder; |
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this.from = from; |
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} |
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public FromBuilder(FromBuilder parent) { |
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super(parent); |
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this.builder = parent.getBuilder(); |
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this.from = parent.getFrom(); |
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} |
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@Fluent |
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public ProcessorFactory to(@FluentArg("uri")String uri) { |
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return to(endpoint(uri)); |
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} |
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@Fluent |
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public ProcessorFactory to(@FluentArg("ref")Endpoint endpoint) { |
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ToBuilder answer = new ToBuilder(this, endpoint); |
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addProcessBuilder(answer); |
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return answer; |
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} |
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@Fluent |
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public ProcessorFactory to(String... uris) { |
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return to(endpoints(uris)); |
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} |
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@Fluent |
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public ProcessorFactory to( |
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@FluentArg(value = "endpoint", attribute = false, element = true) |
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Endpoint... endpoints) { |
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return to(endpoints(endpoints)); |
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} |
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@Fluent |
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public ProcessorFactory to(@FluentArg(value = "endpoint", attribute = false, element = true) |
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Collection<Endpoint> endpoints) { |
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return addProcessBuilder(new MulticastBuilder(this, endpoints)); |
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} |
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@Fluent |
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public ProcessorFactory pipeline(@FluentArg("uris")String... uris) { |
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return pipeline(endpoints(uris)); |
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} |
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@Fluent |
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public ProcessorFactory pipeline(@FluentArg("endpoints")Endpoint... endpoints) { |
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return pipeline(endpoints(endpoints)); |
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} |
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@Fluent |
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public ProcessorFactory pipeline(@FluentArg("endpoints")Collection<Endpoint> endpoints) { |
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return addProcessBuilder(new PipelineBuilder(this, endpoints)); |
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} |
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@Fluent |
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public IdempotentConsumerBuilder idempotentConsumer( |
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@FluentArg("messageIdExpression")Expression messageIdExpression, |
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@FluentArg("MessageIdRepository")MessageIdRepository messageIdRepository) { |
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return (IdempotentConsumerBuilder) addProcessBuilder(new IdempotentConsumerBuilder(this, messageIdExpression, messageIdRepository)); |
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} |
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@Fluent |
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public FilterBuilder filter( |
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@FluentArg(value = "predicate", element = true) |
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Predicate predicate) { |
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FilterBuilder answer = new FilterBuilder(this, predicate); |
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addProcessBuilder(answer); |
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return answer; |
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} |
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@Fluent(nestedActions = true) |
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public ChoiceBuilder choice() { |
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ChoiceBuilder answer = new ChoiceBuilder(this); |
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addProcessBuilder(answer); |
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return answer; |
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} |
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@Fluent |
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public RecipientListBuilder recipientList( |
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@FluentArg(value = "recipients", element = true) |
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Expression receipients) { |
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RecipientListBuilder answer = new RecipientListBuilder(this, receipients); |
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addProcessBuilder(answer); |
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return answer; |
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} |
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@Fluent |
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public SplitterBuilder splitter(@FluentArg(value = "recipients", element = true)Expression receipients) { |
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SplitterBuilder answer = new SplitterBuilder(this, receipients); |
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addProcessBuilder(answer); |
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return answer; |
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} |
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public ResequencerBuilder resequencer(Expression<Exchange> expression) { |
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return resequencer(Collections.<Expression<Exchange>>singletonList(expression)); |
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} |
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@Fluent |
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public ResequencerBuilder resequencer(@FluentArg(value = "expressions")List<Expression<Exchange>> expressions) { |
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ResequencerBuilder answer = new ResequencerBuilder(this, expressions); |
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setRouteBuilder(answer); |
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return answer; |
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} |
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@Fluent |
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public ResequencerBuilder resequencer(Expression<Exchange>... expressions) { |
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List<Expression<Exchange>> list = new ArrayList<Expression<Exchange>>(); |
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for (Expression<Exchange> expression : expressions) { |
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list.add(expression); |
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} |
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return resequencer(list); |
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} |
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@Fluent |
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public FromBuilder errorHandler(@FluentArg("handler")ErrorHandlerBuilder errorHandlerBuilder) { |
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setErrorHandlerBuilder(errorHandlerBuilder); |
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return this; |
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} |
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@Fluent |
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public FromBuilder inheritErrorHandler(@FluentArg("condition")boolean condition) { |
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setInheritErrorHandler(condition); |
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return this; |
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} |
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@Fluent(nestedActions = true) |
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public InterceptorBuilder intercept() { |
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InterceptorBuilder answer = new InterceptorBuilder(this); |
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addProcessBuilder(answer); |
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return answer; |
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} |
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@Fluent |
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public FromBuilder trace() { |
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return trace(DEFAULT_TRACE_CATEGORY); |
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} |
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@Fluent |
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public FromBuilder trace(@FluentArg("category")String category) { |
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final Log log = LogFactory.getLog(category); |
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return intercept(new DelegateProcessor() { |
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@Override |
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public void process(Exchange exchange) throws Exception { |
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log.trace(exchange); |
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processNext(exchange); |
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} |
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}); |
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} |
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@Fluent |
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public FromBuilder intercept(@FluentArg("interceptor")DelegateProcessor interceptor) { |
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InterceptorBuilder answer = new InterceptorBuilder(this); |
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answer.add(interceptor); |
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addProcessBuilder(answer); |
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return answer.target(); |
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} |
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@Fluent(nestedActions = true) |
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public PolicyBuilder policies() { |
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PolicyBuilder answer = new PolicyBuilder(this); |
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addProcessBuilder(answer); |
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return answer; |
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} |
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@Fluent |
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public FromBuilder policy(@FluentArg("policy")Policy policy) { |
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PolicyBuilder answer = new PolicyBuilder(this); |
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answer.add(policy); |
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addProcessBuilder(answer); |
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return answer.target(); |
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} |
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@Fluent |
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public FromBuilder process(@FluentArg("ref")Processor processor) { |
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addProcessorBuilder(processor); |
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return this; |
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} |
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@Fluent |
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public FromBuilder setBody(Expression expression) { |
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addProcessorBuilder(ProcessorBuilder.setBody(expression)); |
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return this; |
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} |
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@Fluent |
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public FromBuilder setOutBody(Expression expression) { |
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addProcessorBuilder(ProcessorBuilder.setOutBody(expression)); |
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return this; |
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} |
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@Fluent |
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public FromBuilder setHeader(String name, Expression expression) { |
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addProcessorBuilder(ProcessorBuilder.setHeader(name, expression)); |
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return this; |
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} |
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@Fluent |
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public FromBuilder setOutHeader(String name, Expression expression) { |
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addProcessorBuilder(ProcessorBuilder.setOutHeader(name, expression)); |
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return this; |
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} |
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@Fluent |
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public FromBuilder setProperty(String name, Expression expression) { |
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addProcessorBuilder(ProcessorBuilder.setProperty(name, expression)); |
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return this; |
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} |
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@Fluent |
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public FromBuilder convertBodyTo(Class type) { |
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addProcessorBuilder(ProcessorBuilder.setBody(Builder.body().convertTo(type))); |
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return this; |
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} |
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@Fluent |
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public FromBuilder convertOutBodyTo(Class type) { |
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addProcessorBuilder(ProcessorBuilder.setOutBody(Builder.outBody().convertTo(type))); |
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return this; |
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} |
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public RouteBuilder getBuilder() { |
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return builder; |
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} |
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public Endpoint getFrom() { |
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return from; |
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} |
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public List<Processor> getProcessors() { |
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return processors; |
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} |
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public ProcessorFactory addProcessBuilder(ProcessorFactory processFactory) { |
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processFactories.add(processFactory); |
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return processFactory; |
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} |
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protected void addProcessorBuilder(Processor processor) { |
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addProcessBuilder(new ConstantProcessorBuilder(processor)); |
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} |
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public void addProcessor(Processor processor) { |
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processors.add(processor); |
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} |
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public Route createRoute() throws Exception { |
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if (routeBuilder != null) { |
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return routeBuilder.createRoute(); |
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} |
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Processor processor = createProcessor(); |
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if (processor == null) { |
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throw new IllegalArgumentException("No processor created for: " + this); |
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} |
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return new EventDrivenConsumerRoute(getFrom(), processor); |
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} |
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public Processor createProcessor() throws Exception { |
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List<Processor> answer = new ArrayList<Processor>(); |
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for (ProcessorFactory processFactory : processFactories) { |
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Processor processor = makeProcessor(processFactory); |
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if (processor == null) { |
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throw new IllegalArgumentException("No processor created for processBuilder: " + processFactory); |
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} |
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answer.add(processor); |
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} |
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if (answer.size() == 0) { |
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return null; |
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} |
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Processor processor = null; |
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if (answer.size() == 1) { |
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processor = answer.get(0); |
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} |
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else { |
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processor = new CompositeProcessor(answer); |
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} |
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return processor; |
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} |
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protected Processor makeProcessor(ProcessorFactory processFactory) throws Exception { |
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Processor processor = processFactory.createProcessor(); |
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processor = wrapProcessor(processor); |
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return wrapInErrorHandler(processor); |
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} |
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protected Processor wrapInErrorHandler(Processor processor) throws Exception { |
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return getErrorHandlerBuilder().createErrorHandler(processor); |
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} |
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protected Processor wrapProcessor(Processor processor) { |
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return processor; |
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} |
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protected FromBuilder getRouteBuilder() { |
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return routeBuilder; |
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} |
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protected void setRouteBuilder(FromBuilder routeBuilder) { |
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this.routeBuilder = routeBuilder; |
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} |
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} |