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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.tomcat.jdbc.pool;


import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.HashMap;
import java.util.Properties;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.locks.ReentrantReadWriteLock;

import javax.management.ObjectName;

import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.jdbc.pool.interceptor.ConnectionState;
import org.apache.tomcat.jdbc.pool.jmx.JmxUtil;

/**
 * Represents a pooled connection
 * and holds a reference to the {@link java.sql.Connection} object
 */
public class PooledConnection implements PooledConnectionMBean {
    /**
     * Logger
     */
    private static final Log log = LogFactory.getLog(PooledConnection.class);

    public static final String PROP_USER = PoolUtilities.PROP_USER;

    public static final String PROP_PASSWORD = PoolUtilities.PROP_PASSWORD;

    /**
     * Validate when connection is borrowed flag
     */
    public static final int VALIDATE_BORROW = 1;
    /**
     * Validate when connection is returned flag
     */
    public static final int VALIDATE_RETURN = 2;
    /**
     * Validate when connection is idle flag
     */
    public static final int VALIDATE_IDLE = 3;
    /**
     * Validate when connection is initialized flag
     */
    public static final int VALIDATE_INIT = 4;
    /**
     * The properties for the connection pool
     */
    protected PoolConfiguration poolProperties;
    /**
     * The underlying database connection
     */
    private volatile java.sql.Connection connection;

    /**
     * If using a XAConnection underneath.
     */
    protected volatile javax.sql.XAConnection xaConnection;
    /**
     * When we track abandon traces, this string holds the thread dump
     */
    private String abandonTrace = null;
    /**
     * Timestamp the connection was last 'touched' by the pool
     */
    private volatile long timestamp;
    /**
     * Lock for this connection only
     */
    private final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(false);
    /**
     * Set to true if this connection has been discarded by the pool
     */
    private volatile boolean discarded = false;
    /**
     * The Timestamp when the last time the connect() method was called successfully
     */
    private volatile long lastConnected = -1;
    /**
     * timestamp to keep track of validation intervals
     */
    private volatile long lastValidated = System.currentTimeMillis();
    /**
     * The parent
     */
    protected ConnectionPool parent;

    private HashMap attributes = new HashMap<>();

    private volatile long connectionVersion=0;

    private static final AtomicLong connectionIndex = new AtomicLong(0);

    private ObjectName oname = null;

    /**
     * Weak reference to cache the list of interceptors for this connection
     * so that we don't create a new list of interceptors each time we borrow
     * the connection
     */
    private volatile JdbcInterceptor handler = null;

    private AtomicBoolean released = new AtomicBoolean(false);

    private volatile boolean suspect = false;

    private java.sql.Driver driver = null;

    /**
     * Constructor
     * @param prop - pool properties
     * @param parent - the parent connection pool
     */
    public PooledConnection(PoolConfiguration prop, ConnectionPool parent) {
        poolProperties = prop;
        this.parent = parent;
        connectionVersion = parent.getPoolVersion();
    }

    @Override
    public long getConnectionVersion() {
        return connectionVersion;
    }

    /**
     * @deprecated use {@link #shouldForceReconnect(String, String)}
     * method kept since it was public, to avoid changing interface.
     * @param username The user name
     * @param password The password
     * @return trueif the pool does not need to reconnect
     */
    @Deprecated
    public boolean checkUser(String username, String password) {
        return !shouldForceReconnect(username, password);
    }

    /**
     * Returns true if we must force reconnect based on credentials passed in.
     * Returns false if {@link PoolConfiguration#isAlternateUsernameAllowed()} method returns false.
     * Returns false if the username/password has not changed since this connection was connected
     * @param username the username you wish to connect with, pass in null to accept the default username from {@link PoolConfiguration#getUsername()}
     * @param password the password you wish to connect with, pass in null to accept the default username from {@link org.apache.tomcat.jdbc.pool.PoolConfiguration#getPassword()}
     * @return true is the pool must reconnect
     */
    public boolean shouldForceReconnect(String username, String password) {

        if (!getPoolProperties().isAlternateUsernameAllowed()) {
          return false;
        }

        if (username==null) {
          username = poolProperties.getUsername();
        }
        if (password==null) {
          password = poolProperties.getPassword();
        }

        String storedUsr = (String)getAttributes().get(PROP_USER);
        String storedPwd = (String)getAttributes().get(PROP_PASSWORD);

        boolean noChangeInCredentials = (username==null && storedUsr==null);
        noChangeInCredentials = (noChangeInCredentials || (username!=null && username.equals(storedUsr)));

        noChangeInCredentials = noChangeInCredentials && ((password==null && storedPwd==null) || (password!=null && password.equals(storedPwd)));

        if (username==null) {
          getAttributes().remove(PROP_USER);
        } else {
          getAttributes().put(PROP_USER, username);
        }
        if (password==null) {
          getAttributes().remove(PROP_PASSWORD);
        } else {
          getAttributes().put(PROP_PASSWORD, password);
        }

        return !noChangeInCredentials;
    }

    /**
     * Connects the underlying connection to the database.
     * @throws SQLException if the method {@link #release()} has been called.
     * @throws SQLException if driver instantiation fails
     * @throws SQLException if a call to {@link java.sql.Driver#connect(String, java.util.Properties)} fails.
     * @throws SQLException if default properties are configured and a call to
     * {@link java.sql.Connection#setAutoCommit(boolean)}, {@link java.sql.Connection#setCatalog(String)},
     * {@link java.sql.Connection#setTransactionIsolation(int)} or {@link java.sql.Connection#setReadOnly(boolean)} fails.
     */
    public void connect() throws SQLException {
        if (released.get()) {
          throw new SQLException("A connection once released, can't be reestablished.");
        }
        if (connection != null) {
            try {
                this.disconnect(false);
            } catch (Exception x) {
                log.debug("Unable to disconnect previous connection.", x);
            } //catch
        } //end if
        //if (poolProperties.getDataSource()==null && poolProperties.getDataSourceJNDI()!=null) {
            //TODO lookup JNDI name
        //}

        if (poolProperties.getDataSource()!=null) {
            connectUsingDataSource();
        } else {
            connectUsingDriver();
        }

        //set up the default state, unless we expect the interceptor to do it
        if (poolProperties.getJdbcInterceptors()==null || poolProperties.getJdbcInterceptors().indexOf(ConnectionState.class.getName())<0 ||
                poolProperties.getJdbcInterceptors().indexOf(ConnectionState.class.getSimpleName())<0) {
            if (poolProperties.getDefaultTransactionIsolation()!=DataSourceFactory.UNKNOWN_TRANSACTIONISOLATION) {
              connection.setTransactionIsolation(poolProperties.getDefaultTransactionIsolation());
            }
            if (poolProperties.getDefaultReadOnly()!=null) {
              connection.setReadOnly(poolProperties.getDefaultReadOnly().booleanValue());
            }
            if (poolProperties.getDefaultAutoCommit()!=null) {
              connection.setAutoCommit(poolProperties.getDefaultAutoCommit().booleanValue());
            }
            if (poolProperties.getDefaultCatalog()!=null) {
              connection.setCatalog(poolProperties.getDefaultCatalog());
            }
        }
        this.discarded = false;
        this.lastConnected = System.currentTimeMillis();
    }

    protected void connectUsingDataSource() throws SQLException {
        String usr = null;
        String pwd = null;
        if (getAttributes().containsKey(PROP_USER)) {
            usr = (String) getAttributes().get(PROP_USER);
        } else {
            usr = poolProperties.getUsername();
            getAttributes().put(PROP_USER, usr);
        }
        if (getAttributes().containsKey(PROP_PASSWORD)) {
            pwd = (String) getAttributes().get(PROP_PASSWORD);
        } else {
            pwd = poolProperties.getPassword();
            getAttributes().put(PROP_PASSWORD, pwd);
        }
        if (poolProperties.getDataSource() instanceof javax.sql.XADataSource) {
            javax.sql.XADataSource xds = (javax.sql.XADataSource)poolProperties.getDataSource();
            if (usr!=null && pwd!=null) {
                xaConnection = xds.getXAConnection(usr, pwd);
                connection = xaConnection.getConnection();
            } else {
                xaConnection = xds.getXAConnection();
                connection = xaConnection.getConnection();
            }
        } else if (poolProperties.getDataSource() instanceof javax.sql.DataSource){
            javax.sql.DataSource ds = (javax.sql.DataSource)poolProperties.getDataSource();
            if (usr!=null && pwd!=null) {
                connection = ds.getConnection(usr, pwd);
            } else {
                connection = ds.getConnection();
            }
        } else if (poolProperties.getDataSource() instanceof javax.sql.ConnectionPoolDataSource){
            javax.sql.ConnectionPoolDataSource ds = (javax.sql.ConnectionPoolDataSource)poolProperties.getDataSource();
            if (usr!=null && pwd!=null) {
                connection = ds.getPooledConnection(usr, pwd).getConnection();
            } else {
                connection = ds.getPooledConnection().getConnection();
            }
        } else {
            throw new SQLException("DataSource is of unknown class:"+(poolProperties.getDataSource()!=null?poolProperties.getDataSource().getClass():"null"));
        }
    }
    protected void connectUsingDriver() throws SQLException {

        try {
            if (driver==null) {
                if (log.isDebugEnabled()) {
                    log.debug("Instantiating driver using class: "+poolProperties.getDriverClassName()+" [url="+poolProperties.getUrl()+"]");
                }
                if (poolProperties.getDriverClassName()==null) {
                    //rely on DriverManager
                    log.warn("Not loading a JDBC driver as driverClassName property is null.");
                } else {
                    driver = (java.sql.Driver)
                        ClassLoaderUtil.loadClass(
                            poolProperties.getDriverClassName(),
                            PooledConnection.class.getClassLoader(),
                            Thread.currentThread().getContextClassLoader()
                        ).getConstructor().newInstance();
                }
            }
        } catch (Exception cn) {
            if (log.isDebugEnabled()) {
                log.debug("Unable to instantiate JDBC driver.", cn);
            }
            SQLException ex = new SQLException(cn.getMessage());
            ex.initCause(cn);
            throw ex;
        }
        String driverURL = poolProperties.getUrl();
        String usr = null;
        String pwd = null;
        if (getAttributes().containsKey(PROP_USER)) {
            usr = (String) getAttributes().get(PROP_USER);
        } else {
            usr = poolProperties.getUsername();
            getAttributes().put(PROP_USER, usr);
        }
        if (getAttributes().containsKey(PROP_PASSWORD)) {
            pwd = (String) getAttributes().get(PROP_PASSWORD);
        } else {
            pwd = poolProperties.getPassword();
            getAttributes().put(PROP_PASSWORD, pwd);
        }
        Properties properties = PoolUtilities.clone(poolProperties.getDbProperties());
        if (usr != null) {
          properties.setProperty(PROP_USER, usr);
        }
        if (pwd != null) {
          properties.setProperty(PROP_PASSWORD, pwd);
        }

        try {
            if (driver==null) {
                connection = DriverManager.getConnection(driverURL, properties);
            } else {
                connection = driver.connect(driverURL, properties);
            }
        } catch (Exception x) {
            if (log.isDebugEnabled()) {
                log.debug("Unable to connect to database.", x);
            }
            if (parent.jmxPool!=null) {
                parent.jmxPool.notify(org.apache.tomcat.jdbc.pool.jmx.ConnectionPool.NOTIFY_CONNECT,
                        ConnectionPool.getStackTrace(x));
            }
            if (x instanceof SQLException) {
                throw (SQLException)x;
            } else {
                SQLException ex = new SQLException(x.getMessage());
                ex.initCause(x);
                throw ex;
            }
        }
        if (connection==null) {
            throw new SQLException("Driver:"+driver+" returned null for URL:"+driverURL);
        }
    }

    /**
     * @return true if connect() was called successfully and disconnect has not yet been called
     */
    @Override
    public boolean isInitialized() {
        return connection!=null;
    }

    /**
     * Returns true if the connection has been connected more than
     * {@link PoolConfiguration#getMaxAge()} milliseconds. false otherwise.
     * @return Returns true if the connection has been connected more than
     * {@link PoolConfiguration#getMaxAge()} milliseconds. false otherwise.
     */
    @Override
    public boolean isMaxAgeExpired() {
        if (getPoolProperties().getMaxAge()>0 ) {
            return (System.currentTimeMillis() - getLastConnected()) > getPoolProperties().getMaxAge();
        } else {
            return false;
        }
    }
    /**
     * Issues a call to {@link #disconnect(boolean)} with the argument false followed by a call to
     * {@link #connect()}
     * @throws SQLException if the call to {@link #connect()} fails.
     */
    public void reconnect() throws SQLException {
        this.disconnect(false);
        this.connect();
    } //reconnect

    /**
     * Disconnects the connection. All exceptions are logged using debug level.
     * @param finalize if set to true, a call to {@link ConnectionPool#finalize(PooledConnection)} is called.
     */
    private void disconnect(boolean finalize) {
        if (isDiscarded() && connection == null) {
            return;
        }
        setDiscarded(true);
        if (connection != null) {
            try {
                parent.disconnectEvent(this, finalize);
                if (xaConnection == null) {
                    connection.close();
                } else {
                    xaConnection.close();
                }
            }catch (Exception ignore) {
                if (log.isDebugEnabled()) {
                    log.debug("Unable to close underlying SQL connection",ignore);
                }
            }
        }
        connection = null;
        xaConnection = null;
        lastConnected = -1;
        if (finalize) {
          parent.finalize(this);
        }
    }


//============================================================================
//
//============================================================================

    /**
     * Returns abandon timeout in milliseconds
     * @return abandon timeout in milliseconds
     */
    public long getAbandonTimeout() {
        if (poolProperties.getRemoveAbandonedTimeout() <= 0) {
            return Long.MAX_VALUE;
        } else {
            return poolProperties.getRemoveAbandonedTimeout() * 1000L;
        } //end if
    }

    /**
     * Returns true if the connection pool is configured
     * to do validation for a certain action.
     * @param action The validation action
     */
    private boolean doValidate(int action) {
        if (action == VALIDATE_BORROW && poolProperties.isTestOnBorrow()) {
          return true;
        } else if (action == VALIDATE_RETURN && poolProperties.isTestOnReturn()) {
          return true;
        } else if (action == VALIDATE_IDLE && poolProperties.isTestWhileIdle()) {
          return true;
        } else if (action == VALIDATE_INIT && poolProperties.isTestOnConnect()) {
          return true;
        } else if (action == VALIDATE_INIT && poolProperties.getInitSQL()!=null) {
          return true;
        } else {
          return false;
        }
    }

    /**
     * Returns true if the object is still valid. if not
     * the pool will call the getExpiredAction() and follow up with one
     * of the four expired methods
     * @param validateAction The value
     * @return true if the connection is valid
     */
    public boolean validate(int validateAction) {
        return validate(validateAction,null);
    }

    /**
     * Validates a connection.
     * @param validateAction the action used. One of {@link #VALIDATE_BORROW}, {@link #VALIDATE_IDLE},
     * {@link #VALIDATE_INIT} or {@link #VALIDATE_RETURN}
     * @param sql the SQL to be used during validation. If the {@link PoolConfiguration#setInitSQL(String)} has been called with a non null
     * value and the action is {@link #VALIDATE_INIT} the init SQL will be used for validation.
     *
     * @return true if the connection was validated successfully. It returns true even if validation was not performed, such as when
     * {@link PoolConfiguration#setValidationInterval(long)} has been called with a positive value.
     * 

* false if the validation failed. The caller should close the connection if false is returned since a session could have been left in * an unknown state during initialization. */ public boolean validate(int validateAction,String sql) { if (this.isDiscarded()) { return false; } if (!doValidate(validateAction)) { //no validation required, no init sql and props not set return true; } //Don't bother validating if already have recently enough long now = System.currentTimeMillis(); if (validateAction!=VALIDATE_INIT && poolProperties.getValidationInterval() > 0 && (now - this.lastValidated) < poolProperties.getValidationInterval()) { return true; } if (poolProperties.getValidator() != null) { if (poolProperties.getValidator().validate(connection, validateAction)) { this.lastValidated = now; return true; } else { if (getPoolProperties().getLogValidationErrors()) { log.error("Custom validation through "+poolProperties.getValidator()+" failed."); } return false; } } String query = sql; if (validateAction == VALIDATE_INIT && poolProperties.getInitSQL() != null) { query = poolProperties.getInitSQL(); } if (query == null) { query = poolProperties.getValidationQuery(); } if (query == null) { boolean transactionCommitted = false; int validationQueryTimeout = poolProperties.getValidationQueryTimeout(); if (validationQueryTimeout < 0) { validationQueryTimeout = 0; } try { if (connection.isValid(validationQueryTimeout)) { this.lastValidated = now; transactionCommitted = silentlyCommitTransactionIfNeeded(); return true; } else { if (getPoolProperties().getLogValidationErrors()) { log.error("isValid() returned false."); } return false; } } catch (SQLException e) { if (getPoolProperties().getLogValidationErrors()) { log.error("isValid() failed.", e); } else if (log.isDebugEnabled()) { log.debug("isValid() failed.", e); } return false; } finally { if (!transactionCommitted) { silentlyRollbackTransactionIfNeeded(); } } } boolean transactionCommitted = false; Statement stmt = null; try { stmt = connection.createStatement(); int validationQueryTimeout = poolProperties.getValidationQueryTimeout(); if (validationQueryTimeout > 0) { stmt.setQueryTimeout(validationQueryTimeout); } stmt.execute(query); stmt.close(); this.lastValidated = now; transactionCommitted = silentlyCommitTransactionIfNeeded(); return true; } catch (Exception ex) { if (getPoolProperties().getLogValidationErrors()) { log.error("SQL Validation error", ex); } else if (log.isDebugEnabled()) { log.debug("Unable to validate object:",ex); } if (stmt!=null) { try { stmt.close();} catch (Exception ignore2){/*NOOP*/} } } finally { if (!transactionCommitted) { silentlyRollbackTransactionIfNeeded(); } } return false; } //validate private boolean silentlyCommitTransactionIfNeeded() { try { if (!connection.getAutoCommit()) { connection.commit(); } return true; } catch (SQLException e) { log.debug("Failed to commit transaction", e); } return false; } private boolean silentlyRollbackTransactionIfNeeded() { try { if (!connection.getAutoCommit()) { connection.rollback(); } return true; } catch (SQLException e) { log.debug("Failed to rollback transaction", e); } return false; } /** * The time limit for how long the object * can remain unused before it is released * @return {@link PoolConfiguration#getMinEvictableIdleTimeMillis()} */ public long getReleaseTime() { return this.poolProperties.getMinEvictableIdleTimeMillis(); } /** * This method is called if (Now - timeCheckedIn > getReleaseTime()) * This method disconnects the connection, logs an error in debug mode if it happens * then sets the {@link #released} flag to false. Any attempts to connect this cached object again * will fail per {@link #connect()} * The connection pool uses the atomic return value to decrement the pool size counter. * @return true if this is the first time this method has been called. false if this method has been called before. */ public boolean release() { try { disconnect(true); } catch (Exception x) { if (log.isDebugEnabled()) { log.debug("Unable to close SQL connection",x); } } if (oname != null) { JmxUtil.unregisterJmx(oname); oname = null; } return released.compareAndSet(false, true); } /** * The pool will set the stack trace when it is check out and * checked in * @param trace the stack trace for this connection */ public void setStackTrace(String trace) { abandonTrace = trace; } /** * Returns the stack trace from when this connection was borrowed. Can return null if no stack trace was set. * @return the stack trace or null of no trace was set */ public String getStackTrace() { return abandonTrace; } /** * Sets a timestamp on this connection. A timestamp usually means that some operation * performed successfully. * @param timestamp the timestamp as defined by {@link System#currentTimeMillis()} */ public void setTimestamp(long timestamp) { this.timestamp = timestamp; setSuspect(false); } @Override public boolean isSuspect() { return suspect; } public void setSuspect(boolean suspect) { this.suspect = suspect; } /** * An interceptor can call this method with the value true, and the connection will be closed when it is returned to the pool. * @param discarded - only valid value is true * @throws IllegalStateException if this method is called with the value false and the value true has already been set. */ public void setDiscarded(boolean discarded) { if (this.discarded && !discarded) { throw new IllegalStateException("Unable to change the state once the connection has been discarded"); } this.discarded = discarded; } /** * Set the timestamp the connection was last validated. * This flag is used to keep track when we are using a {@link PoolConfiguration#setValidationInterval(long) validation-interval}. * @param lastValidated a timestamp as defined by {@link System#currentTimeMillis()} */ public void setLastValidated(long lastValidated) { this.lastValidated = lastValidated; } /** * Sets the pool configuration for this connection and connection pool. * Object is shared with the {@link ConnectionPool} * @param poolProperties The pool properties */ public void setPoolProperties(PoolConfiguration poolProperties) { this.poolProperties = poolProperties; } /** * Return the timestamps of last pool action. Timestamps are typically set when connections * are borrowed from the pool. It is used to keep track of {@link PoolConfiguration#setRemoveAbandonedTimeout(int) abandon-timeouts}. * This timestamp can also be reset by the {@link org.apache.tomcat.jdbc.pool.interceptor.ResetAbandonedTimer#invoke(Object, java.lang.reflect.Method, Object[])} * @return the timestamp of the last pool action as defined by {@link System#currentTimeMillis()} */ @Override public long getTimestamp() { return timestamp; } /** * Returns the discarded flag. * @return the discarded flag. If the value is true, * either {@link #disconnect(boolean)} has been called or it will be called when the connection is returned to the pool. */ @Override public boolean isDiscarded() { return discarded; } /** * Returns the timestamp of the last successful validation query execution. * @return the timestamp of the last successful validation query execution as defined by {@link System#currentTimeMillis()} */ @Override public long getLastValidated() { return lastValidated; } /** * Returns the configuration for this connection and pool * @return the configuration for this connection and pool */ public PoolConfiguration getPoolProperties() { return poolProperties; } /** * Locks the connection only if either {@link PoolConfiguration#isPoolSweeperEnabled()} or * {@link PoolConfiguration#getUseLock()} return true. The per connection lock ensures thread safety is * multiple threads are performing operations on the connection. * Otherwise this is a noop for performance */ public void lock() { if (poolProperties.getUseLock() || this.poolProperties.isPoolSweeperEnabled()) { //optimized, only use a lock when there is concurrency lock.writeLock().lock(); } } /** * Unlocks the connection only if the sweeper is enabled * Otherwise this is a noop for performance */ public void unlock() { if (poolProperties.getUseLock() || this.poolProperties.isPoolSweeperEnabled()) { //optimized, only use a lock when there is concurrency lock.writeLock().unlock(); } } /** * Returns the underlying connection * @return the underlying JDBC connection as it was returned from the JDBC driver * @see javax.sql.PooledConnection#getConnection() */ public java.sql.Connection getConnection() { return this.connection; } /** * Returns the underlying XA connection * @return the underlying XA connection as it was returned from the Datasource */ public javax.sql.XAConnection getXAConnection() { return this.xaConnection; } /** * Returns the timestamp of when the connection was last connected to the database. * ie, a successful call to {@link java.sql.Driver#connect(String, java.util.Properties)}. * @return the timestamp when this connection was created as defined by {@link System#currentTimeMillis()} */ @Override public long getLastConnected() { return lastConnected; } /** * Returns the first handler in the interceptor chain * @return the first interceptor for this connection */ public JdbcInterceptor getHandler() { return handler; } public void setHandler(JdbcInterceptor handler) { if (this.handler!=null && this.handler!=handler) { JdbcInterceptor interceptor = this.handler; while (interceptor!=null) { interceptor.reset(null, null); interceptor = interceptor.getNext(); }//while }//end if this.handler = handler; } @Override public String toString() { return "PooledConnection["+(connection!=null?connection.toString():"null")+"]"; } /** * Returns true if this connection has been released and wont be reused. * @return true if the method {@link #release()} has been called */ @Override public boolean isReleased() { return released.get(); } public HashMap getAttributes() { return attributes; } public void createMBean() { if (oname != null) { return; } String keyprop = ",connections=PooledConnection["+connectionIndex.getAndIncrement()+"]"; oname = JmxUtil.registerJmx(parent.getJmxPool().getObjectName(), keyprop, this); } public ObjectName getObjectName() { return oname; } @Override public void clearWarnings() { try { connection.clearWarnings(); } catch (SQLException e) { log.warn("Unable to clear Warnings, connection will be closed.", e); } } @Override public boolean isClosed() throws SQLException { return connection.isClosed(); } @Override public boolean getAutoCommit() throws SQLException { return connection.getAutoCommit(); } @Override public String getCatalog() throws SQLException { return connection.getCatalog(); } @Override public int getHoldability() throws SQLException { return connection.getHoldability(); } @Override public boolean isReadOnly() throws SQLException { return connection.isReadOnly(); } @Override public String getSchema() throws SQLException { return connection.getSchema(); } @Override public int getTransactionIsolation() throws SQLException { return connection.getTransactionIsolation(); } }





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