svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.db / org.gvsig.fmap.dal.db.jdbc / src / main / java / org / gvsig / fmap / dal / store / jdbc2 / spi / operations / AbstractConnectionOperation.java @ 44198
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| 1 | 43020 | jjdelcerro | package org.gvsig.fmap.dal.store.jdbc2.spi.operations; |
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| 2 | |||
| 3 | import java.sql.Connection; |
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| 4 | import java.sql.SQLException; |
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| 5 | 43377 | jjdelcerro | import org.gvsig.fmap.dal.resource.exception.AccessResourceException; |
| 6 | 43020 | jjdelcerro | import org.gvsig.fmap.dal.store.jdbc.exception.JDBCTransactionRollbackException; |
| 7 | import org.gvsig.fmap.dal.store.jdbc2.JDBCHelper; |
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| 8 | import org.gvsig.fmap.dal.store.jdbc2.spi.JDBCSQLBuilderBase; |
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| 9 | import org.slf4j.Logger; |
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| 10 | import org.slf4j.LoggerFactory; |
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| 11 | |||
| 12 | 44191 | jjdelcerro | @SuppressWarnings("UseSpecificCatch") |
| 13 | 43020 | jjdelcerro | public abstract class AbstractConnectionOperation implements ConnectionOperation { |
| 14 | |||
| 15 | 44058 | jjdelcerro | final static protected Logger LOGGER = LoggerFactory.getLogger(AbstractConnectionOperation.class); |
| 16 | 43020 | jjdelcerro | |
| 17 | final protected JDBCHelper helper; |
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| 18 | 43114 | jjdelcerro | |
| 19 | 43377 | jjdelcerro | protected Connection conn = null; |
| 20 | 43020 | jjdelcerro | |
| 21 | public AbstractConnectionOperation(JDBCHelper helper) {
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| 22 | this.helper = helper;
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| 23 | } |
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| 24 | |||
| 25 | @Override
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| 26 | public boolean continueTransactionAllowed() { |
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| 27 | return false; |
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| 28 | } |
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| 29 | |||
| 30 | @Override
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| 31 | public boolean needTransaction() { |
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| 32 | return true; |
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| 33 | } |
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| 34 | |||
| 35 | protected JDBCSQLBuilderBase createSQLBuilder() {
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| 36 | return this.helper.createSQLBuilder(); |
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| 37 | } |
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| 38 | |||
| 39 | @Override
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| 40 | public Object perform() { |
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| 41 | try {
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| 42 | 44198 | jjdelcerro | if( this.helper.isThreadSafe() ) { |
| 43 | return this.perform_operation(); |
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| 44 | } |
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| 45 | synchronized(AbstractConnectionOperation.class) {
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| 46 | return this.perform_operation(); |
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| 47 | } |
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| 48 | 43020 | jjdelcerro | } catch (RuntimeException ex) { |
| 49 | throw ex;
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| 50 | } catch (Exception ex) { |
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| 51 | throw new RuntimeException("Can't perform operation '"+this.getClass().getSimpleName()+"'.",ex); |
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| 52 | } |
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| 53 | } |
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| 54 | |||
| 55 | 43377 | jjdelcerro | protected Connection getConnection() throws AccessResourceException { |
| 56 | if( this.conn == null ) { |
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| 57 | this.conn = this.helper.getConnection(); |
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| 58 | } |
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| 59 | 43114 | jjdelcerro | return this.conn; |
| 60 | } |
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| 61 | |||
| 62 | 43377 | jjdelcerro | protected Object perform_operation() throws Exception { |
| 63 | Object result = null; |
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| 64 | 44058 | jjdelcerro | LOGGER.debug("preparing execution of "+this.getClass().getSimpleName()+"."); |
| 65 | 43377 | jjdelcerro | if( needTransaction() ) {
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| 66 | try {
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| 67 | 44191 | jjdelcerro | if( this.helper.allowNestedOperations() ) { |
| 68 | boolean commitOnFinish = true; |
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| 69 | if (!this.getConnection().getAutoCommit()) { |
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| 70 | // Casi seguro que es una operacion anidada, asi que no
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| 71 | // terminamos la transaccion.
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| 72 | commitOnFinish = false;
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| 73 | } |
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| 74 | this.getConnection().setAutoCommit(false); |
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| 75 | try {
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| 76 | LOGGER.debug("Excuting operation {}.", this.getClass().getSimpleName()); |
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| 77 | result = perform(this.getConnection());
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| 78 | } catch (Exception ex) { |
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| 79 | try {
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| 80 | this.getConnection().rollback();
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| 81 | } catch (Exception e1) { |
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| 82 | throw new JDBCTransactionRollbackException(e1, ex); |
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| 83 | } |
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| 84 | throw new RuntimeException("Can't perform operation '"+this.getClass().getSimpleName()+"'.",ex); |
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| 85 | 43377 | jjdelcerro | } |
| 86 | 44191 | jjdelcerro | if( commitOnFinish ) {
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| 87 | this.getConnection().commit();
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| 88 | this.getConnection().setAutoCommit(true); |
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| 89 | } |
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| 90 | } else {
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| 91 | if (!this.getConnection().getAutoCommit()) { |
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| 92 | // Casi seguro que es una transaccion anidada, si no
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| 93 | // esta permitido, petamos.
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| 94 | if (!continueTransactionAllowed()) {
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| 95 | throw new SQLException("nested operations not allowed."); |
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| 96 | } |
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| 97 | } |
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| 98 | this.getConnection().setAutoCommit(false); |
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| 99 | 43377 | jjdelcerro | try {
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| 100 | 44191 | jjdelcerro | LOGGER.debug("Excuting operation {}.", this.getClass().getSimpleName()); |
| 101 | result = perform(this.getConnection());
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| 102 | } catch (Exception ex) { |
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| 103 | try {
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| 104 | this.getConnection().rollback();
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| 105 | } catch (Exception e1) { |
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| 106 | throw new JDBCTransactionRollbackException(e1, ex); |
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| 107 | } |
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| 108 | throw new RuntimeException("Can't perform operation '"+this.getClass().getSimpleName()+"'.",ex); |
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| 109 | 43377 | jjdelcerro | } |
| 110 | 44191 | jjdelcerro | this.getConnection().commit();
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| 111 | 43377 | jjdelcerro | } |
| 112 | } finally {
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| 113 | helper.closeConnection(this.getConnection());
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| 114 | conn = null;
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| 115 | 43020 | jjdelcerro | } |
| 116 | 43377 | jjdelcerro | } else {
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| 117 | 43020 | jjdelcerro | try {
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| 118 | 44058 | jjdelcerro | LOGGER.debug("Excuting operation {}.", this.getClass().getSimpleName()); |
| 119 | 43377 | jjdelcerro | result = perform(this.getConnection());
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| 120 | 43020 | jjdelcerro | } catch (Exception ex) { |
| 121 | throw new RuntimeException("Can't perform operation '"+this.getClass().getSimpleName()+"'.",ex); |
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| 122 | 43377 | jjdelcerro | } finally {
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| 123 | helper.closeConnection(this.getConnection());
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| 124 | conn = null;
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| 125 | 43020 | jjdelcerro | } |
| 126 | } |
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| 127 | 43377 | jjdelcerro | return result;
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| 128 | 43020 | jjdelcerro | } |
| 129 | } |