如何将嵌入式PostgreSQL服务器Java组件用作单独的服务？

我正在尝试为在Tomcat（7.x）中运行并依赖于Postgresql（9.x）实例的基于RESTful（服务）基于Java的应用程序创建一个全面的集成测试套件。此外，如果可能的话，我希望能够使用maven failsafe插件将此套件作为独立的进程运行，并且专门从maven 3.x运行。这样，测试可以在3个主要平台（Mac OSX，Linux和Windows）上运行。

据我了解，我相信实现这一目标的关键是执行以下步骤（按此顺序）：

1. 在Maven生命周期的集成前测试阶段中以某种方式启动Postgresql DB的“嵌入式”版本（和模式设置），使postgres-db-process在后台运行
2. 启动加载我的服务应用程序的Java容器：我正在使用Jetty 9.1.5插件
3. 在集成测试阶段从Failsafe插件运行我的（基于JUnit的）测试
4. 在Maven的集成后测试阶段中关闭我的Jetty容器
5. 最后，在生命周期的集成测试后阶段中，使某些机制关闭先前启动的（后台）postgres-db-process（杀死/清理该过程）

在我当前的实现中，成功完成了步骤1-3。在第2步中，它使用exec-maven-plugin，该插件调用一个使用postgresql嵌入式Java组件的Java类。POM.xml的节选：

<plugin>
  <groupId>org.codehaus.mojo</groupId>
  <artifactId>exec-maven-plugin</artifactId>
  <version>1.2.1</version>
  <executions>
    <execution>
          <id>Run Postgres DB start/schema setup</id>
          <phase>pre-integration-test</phase>
            <goals>
              <goal>java</goal>
            </goals>
      </execution>
    </executions>
    <configuration>
      <mainClass>com.some.package.test.utils.DbSetup</mainClass>
      <arguments>
        <argument>setup</argument>
      </arguments>
    </configuration>
</plugin>

这是DBSetup类的摘录，该类使用嵌入postgresql的方式启动一个postgresql实例：

try {
        DownloadConfigBuilder downloadConfigBuilder = new DownloadConfigBuilder();
        downloadConfigBuilder.defaultsForCommand(Command.Postgres);
        downloadConfigBuilder.proxyFactory(new HttpProxyFactory(PROXY_ADDRESS, DEFAULT_PROXY_PORT));
        IRuntimeConfig runtimeConfig = new RuntimeConfigBuilder()
                .defaults(Command.Postgres)
                .artifactStore(new ArtifactStoreBuilder()
                        .defaults(Command.Postgres)
                        .download(downloadConfigBuilder)).build();  

        PostgresStarter<PostgresExecutable, PostgresProcess> runtime = PostgresStarter.getInstance(runtimeConfig);        
        final PostgresConfig config = new PostgresConfig(Version.V9_2_4, new AbstractPostgresConfig.Net(
                    "localhost", 5432
            ), new AbstractPostgresConfig.Storage(dbName), new AbstractPostgresConfig.Timeout(),
                    new AbstractPostgresConfig.Credentials(username, password));        
        config.getAdditionalInitDbParams().addAll(Arrays.asList(
                "-E", "UTF-8",
                "--locale=en_US.UTF-8",
                "--lc-collate=en_US.UTF-8",
                "--lc-ctype=en_US.UTF-8"
            ));     

        exec = runtime.prepare(config);
        process = exec.start();
        System.out.println("embedded Postgres started");
        Thread.sleep(1200L);

    } catch (IOException e) {
        System.out.println("Something Went Wrong initializing embedded Postgres: " + e);
        e.printStackTrace();
    } 
    catch (InterruptedException e) {
        System.out.println("Something Went Wrong Pausing this thread " + e);
        e.printStackTrace();
    }

请注意，我没有process.stop();在启动Postgres实例的方法内调用。因此，我目前无法关闭数据库进程。一旦退出此类DbSetup，对现有过程的所有引用都将丢失。而且Postgres进程永远不会关闭。实际上，似乎码头容器也不会关闭，并且整个Maven作业都已挂断，因此我不得不手动将其杀死（摘自我的Maven控制台输出）：

[INFO] --- exec-maven-plugin:1.2.1:java (Run Postgres DB start/schema setup) @ BLAHBLAH ---
***START of Postgres DB Setup Process ***
Extract /Users/myUserName/.embedpostgresql/postgresql-9.2.4-1-osx-binaries.zip START
...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................Extract /Users/myUserName/.embedpostgresql/postgresql-9.2.4-1-osx-binaries.zip DONE
INFO:20161021 12:58:00: de.flapdoodle.embed.process.runtime.Executable de.flapdoodle.embed.process.runtime.Executable start AbstractPostgresConfig{storage=Storage{dbDir=/var/folders/8g/69wh31fn7nx3q81phwfdpld00000gn/T/postgresql-embed-66cfc41f-0e16-439f-a24b-6e5b6dbc683d/db-content-3bc4b9cc-dd21-43a7-9058-285767f5c53d, dbName='BLAH', isTmpDir=true}, network=Net{host='localhost', port=5432}, timeout=Timeout{startupTimeout=15000}, credentials=Credentials{BLAH, BLAH}, args=[], additionalInitDbParams=[-E, UTF-8, --locale=en_US.UTF-8, --lc-collate=en_US.UTF-8, --lc-ctype=en_US.UTF-8]}
INFO:20161021 12:58:01: de.flapdoodle.embed.process.runtime.Executable de.flapdoodle.embed.process.runtime.Executable start AbstractPostgresConfig{storage=Storage{dbDir=/var/folders/8g/69wh31fn7nx3q81phwfdpld00000gn/T/postgresql-embed-66cfc41f-0e16-439f-a24b-6e5b6dbc683d/db-content-3bc4b9cc-dd21-43a7-9058-285767f5c53d, dbName='BLAH', isTmpDir=true}, network=Net{host='localhost', port=5432}, timeout=Timeout{startupTimeout=15000}, credentials=Credentials{BLAH, BLAH}, args=[BLAH], additionalInitDbParams=[]}
INFO:20161021 12:58:04: de.flapdoodle.embed.process.runtime.Executable de.flapdoodle.embed.process.runtime.Executable start AbstractPostgresConfig{storage=Storage{dbDir=/var/folders/8g/69wh31fn7nx3q81phwfdpld00000gn/T/postgresql-embed-66cfc41f-0e16-439f-a24b-6e5b6dbc683d/db-content-3bc4b9cc-dd21-43a7-9058-285767f5c53d, dbName='BLAH', isTmpDir=true}, network=Net{host='localhost', port=5432}, timeout=Timeout{startupTimeout=15000}, credentials=Credentials{BLAH, BLAH}, args=[], additionalInitDbParams=[-E, UTF-8, --locale=en_US.UTF-8, --lc-collate=en_US.UTF-8, --lc-ctype=en_US.UTF-8]}
embedded Postgres started
***END of Postgres DB Setup Process ***

...

[INFO] --- jetty-maven-plugin:9.1.2.v20140210:run-war (start-jetty) @ BLAH ---
[INFO] Configuring Jetty for project: BlahProject
[INFO] Context path = /
[INFO] Tmp directory = some/path/to/my/webapp/target/tmp
[INFO] Web defaults = org/eclipse/jetty/webapp/webdefault.xml
[INFO] Web overrides =  none
[INFO] jetty-9.1.2.v20140210
[INFO] Scanned 1 container path jars, 133 WEB-INF/lib jars, 1 WEB-INF/classes dirs in 1887ms for context o.e.j.m.p.JettyWebAppContext@444942b0{/,file:/some/path/to/my/webapp/,STARTING}{/some/path/to/my/Application-2.3.33+46be96b464dc5b57b2e2e04ce31718a01360e5fb.war}
[INFO] Initializing Spring root WebApplicationContext
INFO:20161021 12:58:27: org.springframework.web.context.ContextLoader org.springframework.web.context.ContextLoader Root WebApplicationContext: initialization started
INFO:20161021 12:58:27: org.springframework.web.context.support.XmlWebApplicationContext org.springframework.context.support.AbstractApplicationContext Refreshing Root WebApplicationContext: startup date [Fri Oct 21 12:58:27 EDT 2016]; root of context hierarchy
INFO:20161021 12:58:27: org.springframework.beans.factory.xml.XmlBeanDefinitionReader org.springframework.beans.factory.xml.XmlBeanDefinitionReader Loading XML bean definitions from class path resource [spring/app-config.xml]
INFO:20161021 12:58:27: org.springframework.beans.factory.xml.XmlBeanDefinitionReader org.springframework.beans.factory.xml.XmlBeanDefinitionReader Loading XML bean definitions from class path resource [spring/db-config.xml]
INFO:20161021 12:58:28: org.springframework.beans.factory.support.DefaultListableBeanFactory org.springframework.beans.factory.support.DefaultListableBeanFactory Overriding bean definition for bean 'endpointLTERepository': replacing [Root bean: class [org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean]; scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null] with [Root bean: class [org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean]; scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null]

[INFO] Started ServerConnector@3a8f9130{HTTP/1.1}{0.0.0.0:8080}
[INFO] Started Jetty Server

/ Maven控制台输出结束

我认识到，PostgreSQL嵌入式组件旨在在同一单元测试中全部启动和关闭Postgres数据库实例。我试图找到一种使用它的方法，它的使用范围比最初预期的用例还要大。本质上，我想要某种可以通过Maven插件启动的Postgresql嵌入式服务，然后可以将其用于关闭该Postgres进程。

关于如何创建/构建这样的服务和/或插件的任何建议？