org.apache.tomcat.jdbc.pool.interceptor
Class ConnectionState
java.lang.Object
org.apache.tomcat.jdbc.pool.JdbcInterceptor
org.apache.tomcat.jdbc.pool.interceptor.ConnectionState
- All Implemented Interfaces:
- InvocationHandler
public class ConnectionState
- extends JdbcInterceptor
Interceptor that keep track of connection state to avoid roundtrips to the database.
The ConnectionPool
is optimized to do as little work as possible.
The pool itself doesn't remember settings like Connection.setAutoCommit(boolean)
,
Connection.setReadOnly(boolean)
, Connection.setCatalog(String)
or
Connection.setTransactionIsolation(int)
. It relies on the application to remember how and when
these settings have been applied.
In the cases where the application code doesn't know or want to keep track of the state, this interceptor helps cache the
state, and it also avoids roundtrips to the database asking for it.
- Author:
- fhanik
Method Summary |
Object |
invoke(Object proxy,
Method method,
Object[] args)
Gets invoked each time an operation on Connection is invoked. |
void |
reset(ConnectionPool parent,
PooledConnection con)
Gets called each time the connection is borrowed from the pool
This means that if an interceptor holds a reference to the connection
the interceptor can be reused for another connection. |
Methods inherited from class org.apache.tomcat.jdbc.pool.JdbcInterceptor |
compare, compare, disconnected, getNext, getProperties, isUseEquals, poolClosed, poolStarted, setNext, setProperties, setUseEquals |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
readState
protected final String[] readState
writeState
protected final String[] writeState
autoCommit
protected Boolean autoCommit
transactionIsolation
protected Integer transactionIsolation
readOnly
protected Boolean readOnly
catalog
protected String catalog
ConnectionState
public ConnectionState()
reset
public void reset(ConnectionPool parent,
PooledConnection con)
- Description copied from class:
JdbcInterceptor
- Gets called each time the connection is borrowed from the pool
This means that if an interceptor holds a reference to the connection
the interceptor can be reused for another connection.
This method may be called with null as both arguments when we are closing down the connection.
- Specified by:
reset
in class JdbcInterceptor
- Parameters:
parent
- - the connection pool owning the connectioncon
- - the pooled connection
invoke
public Object invoke(Object proxy,
Method method,
Object[] args)
throws Throwable
- Description copied from class:
JdbcInterceptor
- Gets invoked each time an operation on
Connection
is invoked.
- Specified by:
invoke
in interface InvocationHandler
- Overrides:
invoke
in class JdbcInterceptor
- Throws:
Throwable
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