websphere-liberty 上的 java web 应用程序和 Postgres

Question

我正在 docker 上的 websphere-liberty 上部署一个工作的 Tomcat webapp。 webapp 连接到 docker 上的 postgres 数据源。当我尝试与

建立联系时，在 websphere 中

DataSource ds = (DataSource)ctx.lookup("java:comp/env/jdbc/postgres");
Connection conn = ds.getConnection();

我的 web.xml 设置为：

<resource-ref>
        <description>postgreSQL Connection</description>
        <res-ref-name>jdbc/postgres</res-ref-name>
        <res-type>javax.sql.XADataSource</res-type>
        <res-auth>Container</res-auth>
    </resource-ref>

我收到以下错误

javax.naming.NamingException: CWNEN1001E: The object referenced by the java:comp/env/jdbc/postgres JNDI name could not be instantiated.
If the reference name maps to a JNDI name in the deployment descriptor bindings for the application
performing the JNDI lookup, make sure that the JNDI name mapping in the deployment descriptor binding is correct.
If the JNDI name mapping is correct, make sure the target resource
can be resolved with the specified name relative to the default initial context.
[Root exception is com.ibm.wsspi.injectionengine.InjectionException: CWNEN0030E: The
server was unable to obtain an object instance for the java:comp/env/jdbc/postgres reference.
The exception message was: CWNEN1004E: The server was unable to find the jdbc/postgres default binding with the javax.sql.XADataSource type for
the java:comp/env/jdbc/postgres reference.]

我排除这是 docker 网络的问题。我设置错了什么？我的 websphere-liberty 中有什么东西吗？

server.xml 是

<server description="Default server">

  <!-- Enable features -->
 <featureManager>
  <feature>webProfile-7.0</feature>
  <feature>adminCenter-1.0</feature>
  <feature>jdbc-4.0</feature>
</featureManager>  
  <quickStartSecurity userName="admin" userPassword="password"/>
<!-- Define the host name for use by the collective.
    If the host name needs to be changed, the server should be
    removed from the collective and re-joined. -->
<!--  <variable name="defaultHostName" value="localhost" /> -->

<!-- Define an Administrator and non-Administrator -->
<basicRegistry id="basic">
  <user name="admin" password="admin" />
  <user name="nonadmin" password="nonadminpwd" />
</basicRegistry>

<!-- Assign 'admin' to Administrator -->
<administrator-role>
  <user>admin</user>
</administrator-role>

<!--  <keyStore id="defaultKeyStore" password="Liberty" /> -->

<httpEndpoint id="defaultHttpEndpoint"
             host="*"
             httpPort="9080"
             httpsPort="9443" />

<remoteFileAccess>
  <writeDir>${server.config.dir}</writeDir>
</remoteFileAccess> 
<library id="postgres-lib">
  <fileset dir="/arturial/project/" includes="postgresql-9.4.1208.jre6.jar"/>
</library>
<dataSource id="jdbc-Prima_WA_db" jndiName="jdbc/postgres" type="javax.sql.DataSource">
  <jdbcDriver libraryRef="postgres-lib"/>
  <connectionManager numConnectionsPerThreadLocal="10" id="connectionManager" minPoolSize="1"/>
 <!--   <properties.oracle user="postgres" password="postgres" -
               url="jdbc:postgres://172.17.0.3:5432/Prima_WA_db"/> -->
 </dataSource>
<!--
<applicationManager updateTrigger="disabled"/>
<application id="primawebapp" name="primawebapp" location="war/primawebapp" type="war">
  <classLoader delegation="parentLast" commonLibraryRef="postgres-lib"/>
 </application>
-->
</server>

Answer 1

试试这个；

DataSource ds = (DataSource)ctx.lookup("jdbc/postgres");

另外，a different way。

Answer 2

您的<datasource> 必须在其下配置属性，否则 Liberty 无法知道如何连接到您的数据库。

对于postgresql，试试下面的配置：

<dataSource id="jdbc-Prima_WA_db" jndiName="jdbc/postgres">
  <jdbcDriver libraryRef="postgres-lib"/>
  <properties serverName="172.17.0.3" portNumber="5432" databaseName="Prima_WA_db"  
              user="postgres" password="postgres"/>
</dataSource>

当然，使用与您正在运行的 postgresql 实例相对应的正确值。

Answer 3

您的数据源定义可能不完整，请尝试使用以下内容进行更新：

<dataSource type="javax.sql.XADataSource" ...
    <jdbcDriver javax.sql.XADataSource="org.postgresql.xa.PGXADataSource" ...