[resolves wildfly-extras#1784] Add camel spring JPA example

examples/camel-jpa-spring/README.md

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+Camel JPA Spring example
+------------------------
+
+This example demonstrates using the camel-jpa component with Spring and the WildFly Camel susbsystem to persist entities to an in-memory database.
+
+In this example, a Camel route consumes XML files from ${JBOSS_JOME}/standalone/data/customers. Camel then uses JAXB to
+unmarshal the data to a Customer entity. This entity is then passed to a jpa endpoint and is persisted to a 'customer' database
+table.
+
+Prerequisites
+-------------
+
+* Maven
+* An application server with the wildfly-camel subsystem installed
+
+Running the example
+-------------------
+
+To run the example.
+
+1. Start the application server in standalone mode `${JBOSS_HOME}/bin/standalone.sh -c standalone-full-camel.xml`
+2. Build and deploy the project `mvn install -Pdeploy`
+3. Browse to http://localhost:8080/example-camel-jpa-spring/customers
+
+Testing Camel JMS
+-----------------
+
+There are some example customer XML files within the `src/main/resources/customers` directory. To make Camel
+consume them and use JPA to persist the data to an in-memory database, simply copy them to the customers input
+directory.
+
+For Linux / Mac users:
+
+    cp src/main/resources/customers/*.xml ${JBOSS_HOME}/standalone/data/customers/
+
+For Windows users:
+
+    copy src\main\resources\customers\*.xml %JBOSS_HOME%/standalone\data\customers\
+
+The console will output messages detailing what happened to each of the orders. The output
+will look something like this.
+
+```
+2:09:39,385 INFO  [input] (Camel (camel-jpa-context) thread #5 - file:///wildfly/standalone/data/customers) Exchange[Id: ID-localhost-localdomain-35597-1438166553663-11-4, ExchangePattern: InOnly, Properties: {CamelBatchComplete=true, CamelBatchIndex=0, CamelBatchSize=1, CamelCreatedTimestamp=Wed Jul 29 12:09:39 BST 2015, CamelEntityManager=org.hibernate.jpa.internal.EntityManagerImpl@466a65b7, CamelFileExchangeFile=GenericFile[/wildfly/standalone/data/customers/customer.xml], CamelFileLockFileAcquired=true, CamelFileLockFileName=/wildfly/standalone/data/customers/customer.xml.camelLock, CamelMessageHistory=[DefaultMessageHistory[routeId=route7, node=unmarshal3], DefaultMessageHistory[routeId=route7, node=to6], DefaultMessageHistory[routeId=route7, node=to7]], CamelToEndpoint=log://input?showAll=true}, Headers: {breadcrumbId=ID-localhost-localdomain-35597-1438166553663-11-3, CamelFileAbsolute=true, CamelFileAbsolutePath=/wildfly/standalone/data/customers/customer.xml, CamelFileContentType=application/xml, CamelFileLastModified=1438168179000, CamelFileLength=418, CamelFileName=customer.xml, CamelFileNameConsumed=customer.xml, CamelFileNameOnly=customer.xml, CamelFileParent=/wildfly/standalone/data/customers, CamelFilePath=/wildfly/standalone/data/customers/customer.xml, CamelFileRelativePath=customer.xml}, BodyType: org.wildfly.camel.examples.jpa.model.Customer, Body: <?xml version="1.0" encoding="UTF-8" standalone="yes"?><customer xmlns="http://org/wildfly/camel/examples/jpa/model/Customer">    <id>2</id>    <firstName>John</firstName>    <lastName>Doe</lastName>    <dateOfBirth>1975-12-25T00:00:00Z</dateOfBirth></customer>, Out: null: ]
+```
+
+Browse http://localhost:8080/example-camel-jpa-spring/customers and observe the list of customers that have been extracted from the 'customer' in-memory database table.
+
+Undeploy
+--------
+
+To undeploy the example run `mvn clean -Pdeploy`.

examples/camel-jpa-spring/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  #%L
+  Wildfly Camel :: Example :: Camel JPA
+  %%
+  Copyright (C) 2013 - 2014 RedHat
+  %%
+  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.
+  #L%
+  -->
+
+
+<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.wildfly.camel</groupId>
+        <artifactId>wildfly-camel-example</artifactId>
+        <version>4.7.0-SNAPSHOT</version>
+    </parent>
+
+    <name>Wildfly Camel :: Example :: Camel JPA Spring</name>
+
+    <artifactId>example-camel-jpa-spring</artifactId>
+    <packaging>war</packaging>
+
+    <dependencies>
+
+        <!-- Provided -->
+        <dependency>
+            <groupId>org.apache.camel</groupId>
+            <artifactId>camel-jpa</artifactId>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.hibernate.javax.persistence</groupId>
+            <artifactId>hibernate-jpa-2.1-api</artifactId>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.jboss.spec.javax.servlet</groupId>
+            <artifactId>jboss-servlet-api_3.1_spec</artifactId>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.jboss.spec.javax.transaction</groupId>
+            <artifactId>jboss-transaction-api_1.2_spec</artifactId>
+            <scope>provided</scope>
+        </dependency>
+
+    </dependencies>
+
+    <!-- Build -->
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.wildfly.plugins</groupId>
+                <artifactId>wildfly-maven-plugin</artifactId>
+                <configuration>
+                    <skip>${deploy.skip}</skip>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>wildfly-deploy</id>
+                        <phase>install</phase>
+                        <goals>
+                            <goal>deploy-only</goal>
+                        </goals>
+                    </execution>
+                    <execution>
+                        <id>wildfly-undeploy</id>
+                        <phase>clean</phase>
+                        <goals>
+                            <goal>undeploy</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+    <!-- Profiles -->
+    <profiles>
+        <profile>
+            <id>deploy</id>
+            <properties>
+                <deploy.skip>false</deploy.skip>
+            </properties>
+        </profile>
+    </profiles>
+</project>

examples/camel-jpa-spring/src/main/java/org/wildfly/camel/examples/jpa/CustomerServlet.java

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+/*
+ * #%L
+ * Wildfly Camel :: Example :: Camel JPA
+ * %%
+ * Copyright (C) 2013 - 2014 RedHat
+ * %%
+ * 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.
+ * #L%
+ */
+package org.wildfly.camel.examples.jpa;
+
+import java.io.IOException;
+
+import javax.annotation.Resource;
+import javax.persistence.EntityManager;
+import javax.persistence.EntityManagerFactory;
+import javax.persistence.criteria.CriteriaBuilder;
+import javax.persistence.criteria.CriteriaQuery;
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.camel.CamelContext;
+import org.apache.camel.component.jpa.JpaComponent;
+import org.wildfly.camel.examples.jpa.model.Customer;
+
+@SuppressWarnings("serial")
+@WebServlet(name = "HttpServiceServlet", urlPatterns = { "/customers/*" }, loadOnStartup = 1)
+public class CustomerServlet extends HttpServlet {
+
+    @Resource(name = "java:jboss/camel/context/jpa-camel-context")
+    private CamelContext camelContext;
+
+    @Override
+    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        /*
+         * Simple servlet to retrieve all customers from the in memory database for
+         * output and display on customers.jsp
+         */
+        JpaComponent component = camelContext.getComponent("jpa", JpaComponent.class);
+        EntityManagerFactory entityManagerFactory = component.getEntityManagerFactory();
+
+        EntityManager em = entityManagerFactory.createEntityManager();
+
+        CriteriaBuilder criteriaBuilder = em.getCriteriaBuilder();
+        CriteriaQuery<Customer> query = criteriaBuilder.createQuery(Customer.class);
+        query.select(query.from(Customer.class));
+
+        request.setAttribute("customers", em.createQuery(query).getResultList());
+        request.getRequestDispatcher("customers.jsp").forward(request, response);
+    }
+}

examples/camel-jpa-spring/src/main/java/org/wildfly/camel/examples/jpa/model/Customer.java

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+/*
+ * #%L
+ * Wildfly Camel :: Example :: Camel CDI
+ * %%
+ * Copyright (C) 2013 - 2014 RedHat
+ * %%
+ * 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.
+ * #L%
+ */
+package org.wildfly.camel.examples.jpa.model;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.persistence.Table;
+import javax.xml.bind.annotation.XmlAccessType;
+import javax.xml.bind.annotation.XmlAccessorType;
+import javax.xml.bind.annotation.XmlRootElement;
+import java.io.Serializable;
+import java.util.Date;
+
+@XmlRootElement(name = "customer")
+@XmlAccessorType(XmlAccessType.FIELD)
+@Entity
+@Table(name = "customer")
+public class Customer implements Serializable {
+
+    private static final long serialVersionUID = -2372350530824400584L;
+
+    @Id
+    @GeneratedValue
+    private Long id;
+    private String firstName;
+    private String lastName;
+    private Date dateOfBirth;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+
+    public Date getDateOfBirth() {
+        return dateOfBirth;
+    }
+
+    public void setDateOfBirth(Date dateOfBirth) {
+        this.dateOfBirth = dateOfBirth;
+    }
+}

examples/camel-jpa-spring/src/main/java/org/wildfly/camel/examples/jpa/model/package-info.java

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+@javax.xml.bind.annotation.XmlSchema(namespace = "http://org/wildfly/camel/examples/jpa/model/Customer", elementFormDefault = javax.xml.bind.annotation.XmlNsForm.QUALIFIED)
+package org.wildfly.camel.examples.jpa.model;

examples/camel-jpa-spring/src/main/resources/META-INF/persistence.xml

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+<persistence version="2.0"
+             xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+             xsi:schemaLocation="
+        http://java.sun.com/xml/ns/persistence
+        http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
+
+    <persistence-unit name="camel">
+        <provider>org.hibernate.ejb.HibernatePersistence</provider>
+        <jta-data-source>java:jboss/datasources/ExampleDS</jta-data-source>
+        <class>org.wildfly.camel.examples.jpa.model.Customer</class>
+        <properties>
+            <property name="hibernate.hbm2ddl.auto" value="create-drop"/>
+            <property name="hibernate.transaction.jta.platform" value="JBossAS" />
+        </properties>
+    </persistence-unit>
+</persistence>

examples/camel-jpa-spring/src/main/resources/customers/customer-bob.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<cus:customer xmlns:cus="http://org/wildfly/camel/examples/jpa/model/Customer"
+              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+              xsi:schemaLocation="http://org/wildfly/camel/examples/jpa/model/Customer">
+    <cus:firstName>Bob</cus:firstName>
+    <cus:lastName>Doe</cus:lastName>
+    <cus:dateOfBirth>1975-12-25</cus:dateOfBirth>
+</cus:customer>

examples/camel-jpa-spring/src/main/resources/customers/customer-john.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<cus:customer xmlns:cus="http://org/wildfly/camel/examples/jpa/model/Customer"
+              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+              xsi:schemaLocation="http://org/wildfly/camel/examples/jpa/model/Customer">
+    <cus:firstName>John</cus:firstName>
+    <cus:lastName>Doe</cus:lastName>
+    <cus:dateOfBirth>1975-12-25</cus:dateOfBirth>
+</cus:customer>

examples/camel-jpa-spring/src/main/resources/org/wildfly/camel/examples/jpa/model/jaxb.index

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+Customer