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Posted to commits@camel.apache.org by ac...@apache.org on 2018/07/24 10:14:32 UTC
[camel] 06/07: Add camel-ehcache blueprint example
This is an automated email from the ASF dual-hosted git repository.
acosentino pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/camel.git
commit 923fdc04e4295bfbfc524c45e00f0e073fafeeae
Author: Tadayoshi Sato <sa...@gmail.com>
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 @@
+
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diff --git a/examples/camel-example-ehcache-blueprint/src/main/resources/META-INF/NOTICE.txt b/examples/camel-example-ehcache-blueprint/src/main/resources/META-INF/NOTICE.txt
new file mode 100644
index 0000000..2e215bf
--- /dev/null
+++ b/examples/camel-example-ehcache-blueprint/src/main/resources/META-INF/NOTICE.txt
@@ -0,0 +1,11 @@
+ =========================================================================
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+ == the Apache License, Version 2.0, ==
+ == in this case for the Apache Camel distribution. ==
+ =========================================================================
+
+ This product includes software developed by
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+
+ Please read the different LICENSE files present in the licenses directory of
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diff --git a/examples/camel-example-ehcache-blueprint/src/main/resources/OSGI-INF/blueprint/camel-context.xml b/examples/camel-example-ehcache-blueprint/src/main/resources/OSGI-INF/blueprint/camel-context.xml
new file mode 100644
index 0000000..4e2ad04
--- /dev/null
+++ b/examples/camel-example-ehcache-blueprint/src/main/resources/OSGI-INF/blueprint/camel-context.xml
@@ -0,0 +1,46 @@
+<?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.
+
+-->
+<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>