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commit 923fdc04e4295bfbfc524c45e00f0e073fafeeae Author: Tadayoshi Sato <[email protected]> AuthorDate: Tue Jul 24 18:37:13 2018 +0900 Add camel-ehcache blueprint example --- examples/camel-example-ehcache-blueprint/README.md | 61 +++++++ examples/camel-example-ehcache-blueprint/pom.xml | 86 +++++++++ .../apache/camel/example/ehcache/CacheData.java | 58 ++++++ .../apache/camel/example/ehcache/CachingRoute.java | 60 ++++++ .../apache/camel/example/ehcache/DataService.java | 44 +++++ .../src/main/resources/META-INF/LICENSE.txt | 203 +++++++++++++++++++++ .../src/main/resources/META-INF/NOTICE.txt | 11 ++ .../resources/OSGI-INF/blueprint/camel-context.xml | 46 +++++ .../src/main/resources/ehcache.xml | 36 ++++ .../src/main/resources/log4j2.properties | 23 +++ examples/pom.xml | 1 + 11 files changed, 629 insertions(+) diff --git a/examples/camel-example-ehcache-blueprint/README.md b/examples/camel-example-ehcache-blueprint/README.md new file mode 100644 index 0000000..9791610 --- /dev/null +++ b/examples/camel-example-ehcache-blueprint/README.md @@ -0,0 +1,61 @@ +# Camel Ehcache Blueprint example + +### Introduction +This example shows how to use `camel-ehcache` to cache messages in a Camel route. + +### Build +You will need to compile this example first: + + mvn install + + +### Run with Karaf +To install Apache Camel in Karaf you type in the shell (we use version ${project.version}): + + feature:repo-add camel ${project.version} + feature:install camel + +First you need to install the following features in Karaf with: + + feature:install camel-ehcache + feature:install camel-servlet + feature:install camel-jackson + + +Then you can install the example: + + install -s mvn:org.apache.camel.example/camel-example-ehcache-blueprint/${project.version} + +And you can see the application running by tailing the logs: + + log:tail + +And you can use <kbd>ctrl</kbd>+<kbd>c</kbd> to stop tailing the log. + +There is a data REST service that supports the following operation(s): + +- GET /data/{id} - to get data with the given id from an external service + +From a web browser you can access the service using the following link(s): + + http://localhost:8181/camel-example-ehcache-blueprint/data/123 - to get the data with id 123 + +From the command shell you can use `curl` to access the service as shown below: + + curl -X GET -H "Accept: application/json" http://localhost:8181/camel-example-ehcache-blueprint/data/123 + +The first time you try to get the data it will take 3 seconds as the example (pretends to) access an external data service. +But then the data will be cached, so it will be quick afterward. + + +### Configuration +This example is implemented in XML DSL in the `src/main/resources/OSGI-INF/bluepring/camel-context.xml` file. + + +### Forum, Help, etc + +If you hit an problems please let us know on the Camel Forums + <http://camel.apache.org/discussion-forums.html> + +Please help us make Apache Camel better - we appreciate any feedback you may +have. Enjoy! diff --git a/examples/camel-example-ehcache-blueprint/pom.xml b/examples/camel-example-ehcache-blueprint/pom.xml new file mode 100644 index 0000000..996d0c2 --- /dev/null +++ b/examples/camel-example-ehcache-blueprint/pom.xml @@ -0,0 +1,86 @@ +<?xml version="1.0" encoding="UTF-8"?> +<!-- + + Licensed to the Apache Software Foundation (ASF) under one or more + contributor license agreements. See the NOTICE file distributed with + this work for additional information regarding copyright ownership. + The ASF licenses this file to You 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. + +--> +<project xmlns="http://maven.apache.org/POM/4.0.0"; xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; + xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd";> + + <modelVersion>4.0.0</modelVersion> + + <parent> + <groupId>org.apache.camel.example</groupId> + <artifactId>examples</artifactId> + <version>2.23.0-SNAPSHOT</version> + </parent> + + <artifactId>camel-example-ehcache-blueprint</artifactId> + <name>Camel :: Example :: Ehcache :: Blueprint</name> + <description>An example using Ehcache with OSGi Blueprint</description> + <packaging>jar</packaging> + + <properties> + <category>OSGi</category> + <title>Ehcache Blueprint</title> + + <camel.osgi.import.pkg> + * + </camel.osgi.import.pkg> + <camel.osgi.export.pkg> + * + </camel.osgi.export.pkg> + </properties> + + <dependencies> + + <!-- camel --> + <dependency> + <groupId>org.apache.camel</groupId> + <artifactId>camel-blueprint</artifactId> + </dependency> + <dependency> + <groupId>org.apache.camel</groupId> + <artifactId>camel-ehcache</artifactId> + </dependency> + <dependency> + <groupId>org.apache.camel</groupId> + <artifactId>camel-servlet</artifactId> + </dependency> + <dependency> + <groupId>org.apache.camel</groupId> + <artifactId>camel-jackson</artifactId> + </dependency> + + <!-- logging --> + <dependency> + <groupId>org.apache.logging.log4j</groupId> + <artifactId>log4j-api</artifactId> + <scope>runtime</scope> + </dependency> + <dependency> + <groupId>org.apache.logging.log4j</groupId> + <artifactId>log4j-core</artifactId> + <scope>runtime</scope> + </dependency> + <dependency> + <groupId>org.apache.logging.log4j</groupId> + <artifactId>log4j-slf4j-impl</artifactId> + <scope>runtime</scope> + </dependency> + </dependencies> + +</project> diff --git a/examples/camel-example-ehcache-blueprint/src/main/java/org/apache/camel/example/ehcache/CacheData.java b/examples/camel-example-ehcache-blueprint/src/main/java/org/apache/camel/example/ehcache/CacheData.java new file mode 100644 index 0000000..c06485a --- /dev/null +++ b/examples/camel-example-ehcache-blueprint/src/main/java/org/apache/camel/example/ehcache/CacheData.java @@ -0,0 +1,58 @@ +/** + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You 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.apache.camel.example.ehcache; + +import java.io.Serializable; +import java.util.Date; + +import com.fasterxml.jackson.annotation.JsonFormat; + +public class CacheData implements Serializable { + + private static final long serialVersionUID = 996437822624011472L; + + private Long id; + + private String value; + + @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss") + private Date created; + + public Long getId() { + return id; + } + + public void setId(Long id) { + this.id = id; + } + + public String getValue() { + return value; + } + + public void setValue(String value) { + this.value = value; + } + + public Date getCreated() { + return created; + } + + public void setCreated(Date created) { + this.created = created; + } +} diff --git a/examples/camel-example-ehcache-blueprint/src/main/java/org/apache/camel/example/ehcache/CachingRoute.java b/examples/camel-example-ehcache-blueprint/src/main/java/org/apache/camel/example/ehcache/CachingRoute.java new file mode 100644 index 0000000..9e8e431 --- /dev/null +++ b/examples/camel-example-ehcache-blueprint/src/main/java/org/apache/camel/example/ehcache/CachingRoute.java @@ -0,0 +1,60 @@ +/** + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You 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.apache.camel.example.ehcache; + +import org.apache.camel.builder.RouteBuilder; +import org.apache.camel.component.ehcache.EhcacheConstants; +import org.apache.camel.model.rest.RestBindingMode; + +public class CachingRoute extends RouteBuilder { + + private static final String EHCACHE_ENDPOINT = "ehcache://dataServiceCache" + + "?configurationUri=/ehcache.xml" + + "&keyType=java.lang.Long" + + "&valueType=java.io.Serializable"; + + @Override + public void configure() { + restConfiguration() + .component("servlet") + .bindingMode(RestBindingMode.json) + .contextPath("/camel-example-ehcache-blueprint") + .port(8181) + .dataFormatProperty("prettyPrint", "true"); + + rest("/data").consumes("application/json").produces("application/json") + .get("/{id}").to("direct:getData"); + + // @formatter:off + from("direct:getData").routeId("ehcache-example-get") + .log("ID = ${header.id}") + .setHeader(EhcacheConstants.ACTION, constant(EhcacheConstants.ACTION_GET)) + .setHeader(EhcacheConstants.KEY, header("id").convertTo(Long.class)) + .to(EHCACHE_ENDPOINT) + .choice() + .when(header(EhcacheConstants.ACTION_HAS_RESULT).isNotEqualTo("true")) + .log("No cache hit. Fetching data from external service") + .to("bean:dataService?method=getData(${header.id})") + .setHeader(EhcacheConstants.ACTION, constant(EhcacheConstants.ACTION_PUT)) + .setHeader(EhcacheConstants.KEY, header("id").convertTo(Long.class)) + .to(EHCACHE_ENDPOINT) + .otherwise() + .log("Cache hit. Returning") + .endChoice(); + // @formatter:on + } +} diff --git a/examples/camel-example-ehcache-blueprint/src/main/java/org/apache/camel/example/ehcache/DataService.java b/examples/camel-example-ehcache-blueprint/src/main/java/org/apache/camel/example/ehcache/DataService.java new file mode 100644 index 0000000..48c899a --- /dev/null +++ b/examples/camel-example-ehcache-blueprint/src/main/java/org/apache/camel/example/ehcache/DataService.java @@ -0,0 +1,44 @@ +/** + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You 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.apache.camel.example.ehcache; + +import java.util.Date; +import java.util.UUID; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public class DataService { + + private static final Logger LOG = LoggerFactory.getLogger(DataService.class); + + public CacheData getData(Long id) { + LOG.info("Creating data with ID = {}", id); + + // simulating time-consuming calculation + try { + Thread.sleep(3000); + } catch (Exception e) { + } + + CacheData data = new CacheData(); + data.setId(id); + data.setValue(UUID.randomUUID().toString()); + data.setCreated(new Date()); + return data; + } +} diff --git a/examples/camel-example-ehcache-blueprint/src/main/resources/META-INF/LICENSE.txt b/examples/camel-example-ehcache-blueprint/src/main/resources/META-INF/LICENSE.txt new file mode 100644 index 0000000..6b0b127 --- /dev/null +++ b/examples/camel-example-ehcache-blueprint/src/main/resources/META-INF/LICENSE.txt @@ -0,0 +1,203 @@ + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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See the NOTICE file distributed with + this work for additional information regarding copyright ownership. + The ASF licenses this file to You 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. + +--> +<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0"; + xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; + xsi:schemaLocation=" + http://www.osgi.org/xmlns/blueprint/v1.0.0 https://www.osgi.org/xmlns/blueprint/v1.0.0/blueprint.xsd";> + + <!-- to setup camel servlet with OSGi HttpService --> + <reference id="httpService" interface="org.osgi.service.http.HttpService" /> + + <bean class="org.apache.camel.component.servlet.osgi.OsgiServletRegisterer" + init-method="register" + destroy-method="unregister"> + <property name="alias" value="/camel-example-ehcache-blueprint" /> + <property name="httpService" ref="httpService" /> + <property name="servlet" ref="camelServlet" /> + </bean> + + <bean id="camelServlet" class="org.apache.camel.component.servlet.CamelHttpTransportServlet" /> + + <bean id="dataService" class="org.apache.camel.example.ehcache.DataService" /> + + <bean id="cachingRoute" class="org.apache.camel.example.ehcache.CachingRoute" /> + + <camelContext xmlns="http://camel.apache.org/schema/blueprint";> + <routeBuilder ref="cachingRoute" /> + </camelContext> + +</blueprint> diff --git a/examples/camel-example-ehcache-blueprint/src/main/resources/ehcache.xml b/examples/camel-example-ehcache-blueprint/src/main/resources/ehcache.xml new file mode 100644 index 0000000..b1f87dc --- /dev/null +++ b/examples/camel-example-ehcache-blueprint/src/main/resources/ehcache.xml @@ -0,0 +1,36 @@ +<?xml version="1.0" encoding="UTF-8"?> +<!-- + + Licensed to the Apache Software Foundation (ASF) under one or more + contributor license agreements. See the NOTICE file distributed with + this work for additional information regarding copyright ownership. + The ASF licenses this file to You 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. + +--> +<ehcache:config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; + xmlns:ehcache="http://www.ehcache.org/v3"; + xsi:schemaLocation=" + http://www.ehcache.org/v3 http://www.ehcache.org/schema/ehcache-core-3.5.xsd";> + + <ehcache:persistence directory="${java.io.tmpdir}" /> + + <ehcache:cache alias="dataServiceCache"> + <ehcache:key-type>java.lang.Long</ehcache:key-type> + <ehcache:value-type>java.io.Serializable</ehcache:value-type> + <ehcache:resources> + <ehcache:heap unit="entries">100</ehcache:heap> + <ehcache:disk persistent="false" unit="MB">10</ehcache:disk> + </ehcache:resources> + </ehcache:cache> + +</ehcache:config> diff --git a/examples/camel-example-ehcache-blueprint/src/main/resources/log4j2.properties b/examples/camel-example-ehcache-blueprint/src/main/resources/log4j2.properties new file mode 100644 index 0000000..9deb51c --- /dev/null +++ b/examples/camel-example-ehcache-blueprint/src/main/resources/log4j2.properties @@ -0,0 +1,23 @@ +## --------------------------------------------------------------------------- +## Licensed to the Apache Software Foundation (ASF) under one or more +## contributor license agreements. See the NOTICE file distributed with +## this work for additional information regarding copyright ownership. +## The ASF licenses this file to You 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. +## --------------------------------------------------------------------------- + +appender.console.type = Console +appender.console.name = console +appender.console.layout.type = PatternLayout +appender.console.layout.pattern = %d [%-15.15t] %-5p %-30.30c{1} - %m%n +rootLogger.level = INFO +rootLogger.appenderRef.console.ref = console diff --git a/examples/pom.xml b/examples/pom.xml index c888bcb..033f274 100644 --- a/examples/pom.xml +++ b/examples/pom.xml @@ -60,6 +60,7 @@ <module>camel-example-cxf-proxy</module> <module>camel-example-cxf-tomcat</module> <module>camel-example-console</module> + <module>camel-example-ehcache-blueprint</module> <module>camel-example-ftp</module> <module>camel-example-google-pubsub</module> <module>camel-example-guice-jms</module>
