INT-1477 restructuring samples repo to have basic, intermediate, advancedand applications directories

intermediate/errorhandling/src/main/java/org/springframework/integration/samples/errorhandling/ErrorUnwrapper.java

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+/* Copyright 2002-2008 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.integration.samples.errorhandling;
+
+import org.springframework.integration.Message;
+import org.springframework.integration.MessagingException;
+import org.springframework.integration.annotation.MessageEndpoint;
+import org.springframework.integration.annotation.Transformer;
+import org.springframework.integration.message.ErrorMessage;
+
+/**
+ * @author Iwein Fuld
+ */
+@MessageEndpoint
+public class ErrorUnwrapper {
+
+	@Transformer
+	public Message<?> transform(ErrorMessage errorMessage) {
+		return ((MessagingException) errorMessage.getPayload()).getFailedMessage();
+	}
+
+}

intermediate/errorhandling/src/main/java/org/springframework/integration/samples/errorhandling/Invitation.java

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+/* Copyright 2002-2008 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.integration.samples.errorhandling;
+
+/**
+ * @author Iwein Fuld
+ */
+public class Invitation {
+
+	private final int number;
+
+	public Invitation(int number) {
+		this.number = number;
+	}
+
+	@Override
+	public String toString() {
+		return "Invitation number " + number;
+	}
+
+}

intermediate/errorhandling/src/main/java/org/springframework/integration/samples/errorhandling/PartyGuest.java

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+/* Copyright 2002-2008 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.integration.samples.errorhandling;
+
+import org.apache.log4j.Logger;
+import org.springframework.integration.annotation.MessageEndpoint;
+
+/**
+ * This guest receives invitations, but returns them to sender with a wrong
+ * address exception message.
+ * 
+ * @author Iwein Fuld
+ */
+@MessageEndpoint
+public class PartyGuest {
+	private Logger logger = Logger.getLogger(PartyGuest.class);
+	
+	public void onInvitation(Invitation invitation) {
+		logger.info("Guest is throwing exception");
+		throw new RuntimeException("Wrong address");
+	}
+
+}

intermediate/errorhandling/src/main/java/org/springframework/integration/samples/errorhandling/PartyHost.java

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+/* Copyright 2002-2008 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.integration.samples.errorhandling;
+
+import java.util.concurrent.atomic.AtomicInteger;
+
+import org.apache.log4j.Logger;
+import org.springframework.integration.annotation.MessageEndpoint;
+
+/**
+ * Sends invitations to <code>PartyGuest</code>s and likes to be notified of
+ * delivery failures of course.
+ * 
+ * @author Iwein Fuld
+ */
+@MessageEndpoint
+public class PartyHost {
+	private Logger logger = Logger.getLogger(PartyHost.class);
+	private final AtomicInteger counter = new AtomicInteger(0);
+
+	public Invitation nextInvitation() {
+		return new Invitation(counter.incrementAndGet());
+	}
+
+	public void onInvitationFailed(Invitation inv) {
+		logger.info("Host received failure notification for: " + inv);
+	}
+}

intermediate/errorhandling/src/main/resources/META-INF/spring/integration/errorHandlingDemo.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<beans:beans xmlns="http://www.springframework.org/schema/integration"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:beans="http://www.springframework.org/schema/beans"
+	xmlns:context="http://www.springframework.org/schema/context"
+	xmlns:stream="http://www.springframework.org/schema/integration/stream"
+	xsi:schemaLocation="http://www.springframework.org/schema/beans
+			http://www.springframework.org/schema/beans/spring-beans.xsd
+			http://www.springframework.org/schema/context
+			http://www.springframework.org/schema/context/spring-context.xsd
+			http://www.springframework.org/schema/integration
+			http://www.springframework.org/schema/integration/spring-integration.xsd
+			http://www.springframework.org/schema/integration/stream
+			http://www.springframework.org/schema/integration/stream/spring-integration-stream.xsd">
+
+	<context:component-scan base-package="org.springframework.integration.samples.errorhandling" />
+
+	<poller default="true" fixed-delay="1000" max-messages-per-poll="1"/>
+
+	<inbound-channel-adapter ref="partyHost"
+		method="nextInvitation" channel="invitations" />
+
+	<channel id="invitations">
+		<queue capacity="100" />
+	</channel>
+
+	<chain input-channel="invitations">
+		<header-enricher>
+			<error-channel ref="failed-invitations" />
+		</header-enricher>
+		<service-activator ref="partyGuest" method="onInvitation" />
+	</chain>
+
+	<channel id="failed-invitations" />
+
+	<chain input-channel="failed-invitations">
+		<transformer ref="errorUnwrapper" />
+		<service-activator ref="partyHost" method="onInvitationFailed" />
+	</chain>
+
+	<!--
+		If you don't listen to the default error channel you risk losing track
+		of exceptions, as they cannot be passed back to the sender in band. It
+		is recommended to have a generic error handler in your configuration
+		to prevent this.
+	-->
+	<stream:stderr-channel-adapter channel="errorChannel" append-newline="true" />
+
+</beans:beans>

intermediate/errorhandling/src/test/java/org/springframework/integration/samples/errorhandling/PartyDemoTest.java

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+/*
+ * Copyright 2002-2010 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.integration.samples.errorhandling;
+
+import org.junit.Test;
+import org.springframework.context.support.ClassPathXmlApplicationContext;
+
+/**
+ * Demonstrates the handling of Exceptions in an asynchronous messaging
+ * environment. View the 'errorHandlingDemo.xml' configuration file within
+ * this same package. Notice the use of a <header-enricher/> element
+ * within a <chain/> that establishes an 'error-channel' reference
+ * prior to passing the message to a <service-activator/>.
+ *
+ * @author Iwein Fuld
+ */
+public class PartyDemoTest {
+	@Test
+	public void runPartyDemoTest() throws Exception{
+		new ClassPathXmlApplicationContext("/META-INF/spring/integration/errorHandlingDemo.xml", PartyDemoTest.class);
+		Thread.sleep(5000);
+	}
+}

intermediate/errorhandling/src/test/resources/log4j.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
+<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
+
+	<!-- Appenders -->
+	<appender name="console" class="org.apache.log4j.ConsoleAppender">
+		<param name="Target" value="System.out" />
+		<layout class="org.apache.log4j.PatternLayout">
+			<param name="ConversionPattern" value="%-5p: %c - %m%n" />
+		</layout>
+	</appender>
+
+	<!-- Loggers -->
+	<logger name="org.springframework">
+		<level value="warn" />
+	</logger>
+
+	<logger name="org.springframework.integration.samples">
+		<level value="debug" />
+	</logger>
+
+	<!-- Root Logger -->
+	<root>
+		<priority value="warn" />
+		<appender-ref ref="console" />
+	</root>
+
+</log4j:configuration>