com.mchange.v2.c3p0.stmt.GlobalMaxOnlyStatementCache Maven / Gradle / Ivy

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This OSGi bundle wraps ${pkgArtifactId} ${pkgVersion} jar file.

There is a newer version: 0.9.5.2_1

package com.mchange.v2.c3p0.stmt;

import java.sql.*;
import com.mchange.v2.async.AsynchronousRunner;

public final class GlobalMaxOnlyStatementCache extends GooGooStatementCache
{
    //MT: protected by parent's mainLock
    int max_statements;

    Deathmarch globalDeathmarch = new Deathmarch();

    public GlobalMaxOnlyStatementCache(AsynchronousRunner blockingTaskAsyncRunner, AsynchronousRunner deferredStatementDestroyer, int max_statements, boolean cancelAutomaticallyClosedStatements )
    {
	super( blockingTaskAsyncRunner, deferredStatementDestroyer, cancelAutomaticallyClosedStatements );
	this.max_statements = max_statements;
    }

    //called only in parent's constructor
    protected ConnectionStatementManager createConnectionStatementManager()
    { return new SimpleConnectionStatementManager(); }

    //all below called by parent only with mainLock
    void addStatementToDeathmarches( Object pstmt, Connection physicalConnection )
    { globalDeathmarch.deathmarchStatement( pstmt ); }

    void removeStatementFromDeathmarches( Object pstmt, Connection physicalConnection )
    { globalDeathmarch.undeathmarchStatement( pstmt ); }

    boolean prepareAssimilateNewStatement(Connection pcon)
    {
	int global_size = this.countCachedStatements();
	return (  global_size < max_statements || (global_size == max_statements && globalDeathmarch.cullNext()) );
    }
}