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我正在尝试使用以下代码创建 UniversalConnectonPool：

// Read and process properties
PoolDataSource poolDataSource = createUniversalConnectionPool();
    
universalConnectionPoolManager = UniversalConnectionPoolManagerImpl.getUniversalConnectionPoolManager();
    
universalConnectionPoolManager.createConnectionPool((UniversalConnectionPoolAdapter) poolDataSource);
    
universalConnectionPoolManager.startConnectionPool(getSchema());

.
.
.
.

UniversalConnectionPool universalConnectionPool = universalConnectionPoolManager.getConnectionPool(getSchema());
UniversalPooledConnection universalPooledConnection = universalConnectionPool.borrowConnection(universalConnectionPool.getConnectionRetrievalInfo());

connection = (Connection) universalPooledConnection.getPhysicalConnection();

但是第三行universalConnectionPoolManager.createConnectionPool((UniversalConnectionPoolAdapter) poolDataSource);抛出异常：

Caused by: oracle.ucp.UniversalConnectionPoolException: Universal Connection Pool already exists in the Universal Connection Pool Manager. Universal Connection Pool cannot be added to the Universal Connection Pool Manager
        at oracle.ucp.util.UCPErrorHandler.newUniversalConnectionPoolException(UCPErrorHandler.java:421)
        at oracle.ucp.util.UCPErrorHandler.newUniversalConnectionPoolException(UCPErrorHandler.java:389)
        at oracle.ucp.util.UCPErrorHandler.newUniversalConnectionPoolException(UCPErrorHandler.java:403)
        at oracle.ucp.admin.UniversalConnectionPoolManagerBase.setConnectionPool(UniversalConnectionPoolManagerBase.java:599)
        at oracle.ucp.admin.UniversalConnectionPoolManagerBase.createConnectionPool(UniversalConnectionPoolManagerBase.java:559)
        ... 30 more

你能告诉我我在这里做错了什么吗？我是使用连接池的新手，所以仍在学习它的来龙去脉。

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1 回答 1

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您不能拥有多个同名的池。在您的情况下，您似乎已经有一个同名的现有池。您可以在此处参考 UCP 代码示例。

此外，要借用和返回池连接，您可以使用以下标准 API。请注意，如果池尚未启动，则调用 poolDataSource.getConnection() 会在内部创建并启动池。

// borrows a connection
Connection conn = poolDataSource.getConnection();
// return connection to pool
conn.close();
于 2021-06-17T05:16:59.260 回答