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NIHVIVO-2576 addresses issue with db connections closed by MySQL not being returned to the pool

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brianjlowe 2011-04-29 16:55:58 +00:00
parent 6363b3fb11
commit 2f132d6290
4 changed files with 30 additions and 15 deletions
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webapp/lib/commons-dbcp-1.2.1.jar
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webapp/lib/commons-dbcp-1.2.2.jar
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webapp/lib/commons-dbcp-1.4.jar Normal file
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45
webapp/src/edu/cornell/mannlib/vitro/webapp/dao/jena/SDBGraphGenerator.java
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@ -28,21 +28,36 @@ public class SDBGraphGenerator implements GraphGenerator {
this.storeDesc = storeDesc;
this.graphID = graphID;
}
public Graph generateGraph() {
try {
if ( ( this.connection == null ) || ( this.connection.isClosed() ) ) {
this.connection = ds.getConnection();
}
Store store = SDBFactory.connectStore(connection, storeDesc);
return SDBFactory.connectNamedGraph(store, graphID);
} catch (SQLException e) {
String errMsg = "Unable to generate SDB graph";
log.error(errMsg, e);
throw new RuntimeException(errMsg, e);
}
}
public Graph generateGraph() {
try {
if ( this.connection == null ) {
this.connection = ds.getConnection();
} else if ( this.connection.isClosed() ) {
try {
this.connection.close();
} catch (SQLException e) {
// The connection will throw an "Already closed"
// SQLException that we need to catch. We need to
// make this extra call to .close() in order to make
// sure that the connection is returned to the pool.
// This depends on the particular behavior of version
// 1.4 of the Apache Commons connection pool library.
// Earlier versions threw the exception right away,
// making this impossible. Future versions may do the
// same.
}
this.connection = ds.getConnection();
}
Store store = SDBFactory.connectStore(connection, storeDesc);
return SDBFactory.connectNamedGraph(store, graphID);
} catch (SQLException e) {
String errMsg = "Unable to generate SDB graph";
log.error(errMsg, e);
throw new RuntimeException(errMsg, e);
}
}
public Connection getConnection() {
return connection;
}