在 PaxExam / OSGI 容器中使用 JPA/Hibernate

Question

按照 Christian Schneider 的教程，我已经成功地让 JPA/Hibernate 开始工作： http://liquid-reality.de/display/liquid/2012/01/13/Apache+Karaf+Tutorial+Part+6+-+Database+Access

但这涉及创建一个 "file named etc/org.ops4j.datasource-tasklist.cfg with the following content:"

osgi.jdbc.driver.name=H2-pool-xa
url=jdbc:h2:mem:person
dataSourceName=person

当运行使用 OSGI 容器进行 PaxExam 时，这显然不起作用。

此外，我不想在 blueprint.xml 或 persistence.xml 文件中添加特定于环境的数据源参数，因为这随后需要修改这些文件，因为代码是运行在不同的环境中。

因此，必须有一种方法可以从 JUnit/PaxExam 调用的测试 class 中启动数据源，无论是在 config() 方法中还是在其他地方？

所以问题是：

使用上述 Christian 教程摘录中定义的参数（例如 dataSourceName=person），我们如何在 PaxExam 实例化的 OSGI 容器中启动一个新的数据源来定义？
这是否涉及对测试的改进class
还是在独立文件中创建数据源定义然后添加到 OSGI 容器中更好？

一些项目细节，我的测试class给出如下：

package info.xyz.playground.test.osgi;

import static org.ops4j.pax.exam.CoreOptions.junitBundles;
import static org.ops4j.pax.exam.CoreOptions.mavenBundle;
import info.xyz.playground.core.service.Calculator;

import javax.inject.Inject;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.ops4j.pax.exam.Configuration;
import org.ops4j.pax.exam.Option;
import org.ops4j.pax.exam.ProbeBuilder;
import org.ops4j.pax.exam.TestProbeBuilder;
import org.ops4j.pax.exam.junit.PaxExam;
import org.ops4j.pax.exam.spi.reactors.ExamReactorStrategy;
import org.ops4j.pax.exam.spi.reactors.PerMethod;
import org.osgi.framework.BundleContext;
import org.osgi.framework.Constants;

@RunWith(PaxExam.class)
@ExamReactorStrategy(PerMethod.class)
public class PlaygroundOsgiTestClient
{
    @Inject
    private BundleContext _bundleContext;

    @Inject
    protected Calculator _calculator;


    @ProbeBuilder
    public TestProbeBuilder probeConfiguration(TestProbeBuilder probe)
    {
        System.out.println("TestProbeBuilder gets called");
        probe.setHeader(Constants.DYNAMICIMPORT_PACKAGE, "*");
        probe.setHeader(Constants.IMPORT_PACKAGE, "info.xyz.playground.core.service");
        probe.setHeader(Constants.IMPORT_PACKAGE, "info.xyz.playground.core.service.impl");
        return probe;
    }


    @Configuration
    public Option[] config()
    {
        return new Option[] {
                junitBundles(),

                // Aries
                mavenBundle().groupId("org.apache.aries").artifactId("org.apache.aries.util").versionAsInProject(),
                mavenBundle().groupId("org.apache.aries.proxy").artifactId("org.apache.aries.proxy.api").versionAsInProject(),
                mavenBundle().groupId("org.apache.aries.proxy").artifactId("org.apache.aries.proxy.impl").versionAsInProject(),
                mavenBundle().groupId("org.apache.aries.blueprint").artifactId("org.apache.aries.blueprint.api").versionAsInProject(),
                mavenBundle().groupId("org.apache.aries.blueprint").artifactId("org.apache.aries.blueprint.cm").versionAsInProject(),
                mavenBundle().groupId("org.apache.aries.blueprint").artifactId("org.apache.aries.blueprint.core").versionAsInProject(),
                mavenBundle().groupId("org.apache.aries.blueprint").artifactId("org.apache.aries.blueprint.core.compatibility").versionAsInProject().noStart(),

                // Hibernate and its dependencies
                mavenBundle().groupId("org.apache.servicemix.bundles").artifactId("org.apache.servicemix.bundles.antlr").versionAsInProject().noStart(),
                mavenBundle().groupId("org.jboss.logging").artifactId("jboss-logging").versionAsInProject().noStart(),
                mavenBundle().groupId("org.hibernate.javax.persistence").artifactId("hibernate-jpa-2.1-api").versionAsInProject().noStart(),
                mavenBundle().groupId("org.javassist").artifactId("javassist").versionAsInProject().noStart(),
                mavenBundle().groupId("org.jboss").artifactId("jandex").versionAsInProject().noStart(),
                mavenBundle().groupId("org.apache.servicemix.bundles").artifactId("org.apache.servicemix.bundles.dom4j").versionAsInProject().noStart(),
                mavenBundle().groupId("org.hibernate.common").artifactId("hibernate-commons-annotations").versionAsInProject().noStart(),
                mavenBundle().groupId("org.hibernate").artifactId("hibernate-core").versionAsInProject().noStart(),
                mavenBundle().groupId("org.hibernate").artifactId("hibernate-entitymanager").versionAsInProject().noStart(),
                mavenBundle().groupId("org.apache.geronimo.specs").artifactId("geronimo-jta_1.1_spec").versionAsInProject().noStart(),
                mavenBundle().groupId("org.hibernate").artifactId("hibernate-osgi").versionAsInProject().noStart(),

                // platform
                mavenBundle().groupId("info.xyz.playground").artifactId("xyz-playground-core").versionAsInProject(),
        };
    }


    @Test
    public void testOne()
    {
        // TODO invoke service to perform database operation
    }

}

blueprint.xml文件如下：

<?xml version="1.0" encoding="UTF-8"?>
<blueprint default-activation="eager"
    xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:jpa="http://aries.apache.org/xmlns/jpa/v1.0.0" xmlns:tx="http://aries.apache.org/xmlns/transactions/v1.0.0"

    xsi:schemaLocation="http://www.osgi.org/xmlns/blueprint/v1.0.0 http://www.osgi.org/xmlns/blueprint/v1.0.0 
            http://www.w3.org/2001/XMLSchema-instance http://www.w3.org/2001/XMLSchema-instance 
            http://aries.apache.org/xmlns/jpa/v1.0.0 http://aries.apache.org/xmlns/jpa/v1.0.0 
            http://aries.apache.org/xmlns/transactions/v1.0.0 http://aries.apache.org/xmlns/transactions/v1.0.0">

    <bean id="calculatorService" class="info.xyz.playground.core.service.impl.CalculatorImpl" />
    <service ref="calculatorService" interface="info.xyz.playground.core.service.Calculator" />

</blueprint>

persistence.xml文件如下：

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">

    <persistence-unit name="Playground" transaction-type="JTA">
        <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
        <jta-data-source>osgi:service/Playground</jta-data-source>
        <class>info.xyz.playground.core.data.Thing</class>
        <exclude-unlisted-classes>true</exclude-unlisted-classes>
        <properties>
            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
            <property name="hibernate.show_sql" value="true" />
            <property name="hibernate.format_sql" value="true" />
        </properties>
    </persistence-unit>

</persistence>

我的测试项目的pom.xml文件如下：

<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>
    <groupId>info.xyz.playground</groupId>
    <artifactId>xyz-playground-test-osgi</artifactId>
    <version>0.0.1</version>

    <parent>
        <groupId>info.xyz.playground</groupId>
        <artifactId>xyz-playground</artifactId>
        <version>0.0.1</version>
        <relativePath>../xyz-playground</relativePath>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.ops4j.pax.exam</groupId>
            <artifactId>pax-exam-container-native</artifactId>
            <version>${pax.exam.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.ops4j.pax.exam</groupId>
            <artifactId>pax-exam-junit4</artifactId>
            <version>${pax.exam.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.ops4j.pax.exam</groupId>
            <artifactId>pax-exam-link-mvn</artifactId>
            <version>${pax.exam.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.ops4j.pax.url</groupId>
            <artifactId>pax-url-aether</artifactId>
            <version>${pax.url.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.ops4j.pax.exam</groupId>
            <artifactId>pax-exam</artifactId>
            <version>${pax.exam.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.ops4j.pax.exam</groupId>
            <artifactId>pax-exam-inject</artifactId>
            <version>${pax.exam.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.aries</groupId>
            <artifactId>org.apache.aries.util</artifactId>
            <version>1.1.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.aries.proxy</groupId>
            <artifactId>org.apache.aries.proxy.api</artifactId>
            <version>1.0.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.aries.proxy</groupId>
            <artifactId>org.apache.aries.proxy.impl</artifactId>
            <version>1.0.4</version>
        </dependency>
        <dependency>
            <groupId>org.apache.aries.blueprint</groupId>
            <artifactId>org.apache.aries.blueprint.api</artifactId>
            <version>1.0.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.aries.blueprint</groupId>
            <artifactId>org.apache.aries.blueprint.core</artifactId>
            <version>1.4.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.aries.blueprint</groupId>
            <artifactId>org.apache.aries.blueprint.core.compatibility</artifactId>
            <version>1.0.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.aries.blueprint</groupId>
            <artifactId>org.apache.aries.blueprint.cm</artifactId>
            <version>1.0.5</version>
        </dependency>

        <dependency>
            <groupId>org.apache.felix</groupId>
            <artifactId>org.apache.felix.framework</artifactId>
            <version>5.4.0</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
            <version>${ch.qos.logback.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>${ch.qos.logback.version}</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>javax.inject</groupId>
            <artifactId>javax.inject</artifactId>
            <version>${javax.inject.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>

        <!-- Testing target -->
        <dependency>
            <groupId>info.xyz.playground</groupId>
            <artifactId>xyz-playground-core</artifactId>
            <version>0.0.1</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <!-- Needed if you use versionAsInProject() -->
            <plugin>
                <groupId>org.apache.servicemix.tooling</groupId>
                <artifactId>depends-maven-plugin</artifactId>
                <version>1.3.1</version>
                <executions>
                    <execution>
                        <id>generate-depends-file</id>
                        <goals>
                            <goal>generate-depends-file</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.3</version>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

Answer 1

您可以使用与 aries itests 相同的方法。注入 ConfigurationAdmin 并在 @Before 方法中创建配置。

在 PaxExam / OSGI 容器中使用 JPA/Hibernate

Using JPA/Hibernate within PaxExam / OSGI Container

osgi

hibernate

jpa

maven

pax-exam