Reworked MySQL connection pool.

src/bootswithdefer/JDCBPool/ConnectionService.java

@@ -1,104 +0,0 @@
-package bootswithdefer.JDCBPool;
-
-import java.sql.Connection;
-import java.sql.DriverManager;
-import java.sql.SQLException;
-import java.util.Enumeration;
-import java.util.Vector;
-
-/**
- * <b>Purpose:</b>Realizes a connection pool for all JDBC connections.<br>
- * <b>Description:</b>http://java.sun.com/developer/onlineTraining/Programming/JDCBook/
- * conpool.html<br>
- * <b>Copyright:</b>Licensed under the Apache License, Version 2.0.
- * http://www.apache.org/licenses/LICENSE-2.0<br>
- * <b>Company:</b>SIMPL<br>
- * 
- * @author schneimi
- * @version $Id$<br>
- * @link http://code.google.com/p/simpl09/
- */
-public class ConnectionService {
-  private Vector<JDCConnection> connections;
-  private String url, user, password;
-  final private long timeout = 60000;
-  private ConnectionReaper reaper;
-  final private int poolsize = 10;
-
-  public ConnectionService(String url, String user, String password) {
-    this.url = url;
-    this.user = user;
-    this.password = password;
-    connections = new Vector<JDCConnection>(poolsize);
-    reaper = new ConnectionReaper(this);
-    reaper.start();
-  }
-
-  public synchronized void reapConnections() {
-    long stale = System.currentTimeMillis() - timeout;
-    Enumeration<JDCConnection> connlist = connections.elements();
-
-    while ((connlist != null) && (connlist.hasMoreElements())) {
-      JDCConnection conn = connlist.nextElement();
-
-      if ((conn.inUse()) && (stale > conn.getLastUse()) && (!conn.validate())) {
-        removeConnection(conn);
-      }
-    }
-  }
-
-  public synchronized void closeConnections() {
-    Enumeration<JDCConnection> connlist = connections.elements();
-
-    while ((connlist != null) && (connlist.hasMoreElements())) {
-      JDCConnection conn = connlist.nextElement();
-      removeConnection(conn);
-    }
-  }
-
-  private synchronized void removeConnection(JDCConnection conn) {
-    connections.removeElement(conn);
-  }
-
-  public synchronized Connection getConnection() throws SQLException {
-    JDCConnection c;
-
-    for (int i = 0; i < connections.size(); i++) {
-      c = connections.elementAt(i);
-      if (c.lease()) {
-        return c;
-      }
-    }
-
-    Connection conn = DriverManager.getConnection(url, user, password);
-    c = new JDCConnection(conn, this);
-    c.lease();
-    connections.addElement(c);
-
-    return c.getConnection();
-  }
-
-  public synchronized void returnConnection(JDCConnection conn) {
-    conn.expireLease();
-  }
-}
-
-class ConnectionReaper extends Thread {
-  private ConnectionService pool;
-  private final long delay = 300000;
-
-  ConnectionReaper(ConnectionService pool) {
-    this.pool = pool;
-  }
-
-  @Override
-  public void run() {
-    while (true) {
-      try {
-        Thread.sleep(delay);
-      } catch (InterruptedException e) {
-      }
-      pool.reapConnections();
-    }
-  }
-}

src/bootswithdefer/JDCBPool/JDCConnection.java

@@ -1,455 +0,0 @@
-package bootswithdefer.JDCBPool;
-
-import java.sql.Array;
-import java.sql.Blob;
-import java.sql.CallableStatement;
-import java.sql.Clob;
-import java.sql.Connection;
-import java.sql.DatabaseMetaData;
-import java.sql.NClob;
-import java.sql.PreparedStatement;
-import java.sql.SQLClientInfoException;
-import java.sql.SQLException;
-import java.sql.SQLWarning;
-import java.sql.SQLXML;
-import java.sql.Savepoint;
-import java.sql.Statement;
-import java.sql.Struct;
-import java.util.Map;
-import java.util.Properties;
-
-/**
- * <b>Purpose:</b>Wrapper for JDBCConnection.<br>
- * <b>Description:</b>http://java.sun.com/developer/onlineTraining/Programming/JDCBook/
- * conpool.html<br>
- * <b>Copyright:</b>Licensed under the Apache License, Version 2.0.
- * http://www.apache.org/licenses/LICENSE-2.0<br>
- * <b>Company:</b>SIMPL<br>
- * 
- * @author schneimi
- * @version $Id$<br>
- * @link http://code.google.com/p/simpl09/
- */
-public class JDCConnection implements Connection {
-  private ConnectionService pool;
-  private Connection conn;
-  private boolean inuse;
-  private long timestamp;
-
-  public JDCConnection(Connection conn, ConnectionService pool) {
-    this.conn = conn;
-    this.pool = pool;
-    this.inuse = false;
-    this.timestamp = 0;
-  }
-
-  public synchronized boolean lease() {
-    if (inuse) {
-      return false;
-    } else {
-      inuse = true;
-      timestamp = System.currentTimeMillis();
-      return true;
-    }
-  }
-
-  public boolean validate() {
-    try {
-      conn.getMetaData();
-    } catch (Exception e) {
-      return false;
-    }
-    return true;
-  }
-
-  public boolean inUse() {
-    return inuse;
-  }
-
-  public long getLastUse() {
-    return timestamp;
-  }
-
-  public void close() throws SQLException {
-    pool.returnConnection(this);
-  }
-
-  protected void expireLease() {
-    inuse = false;
-  }
-
-  protected Connection getConnection() {
-    return conn;
-  }
-
-  public PreparedStatement prepareStatement(String sql) throws SQLException {
-    return conn.prepareStatement(sql);
-  }
-
-  public CallableStatement prepareCall(String sql) throws SQLException {
-    return conn.prepareCall(sql);
-  }
-
-  public Statement createStatement() throws SQLException {
-    return conn.createStatement();
-  }
-
-  public String nativeSQL(String sql) throws SQLException {
-    return conn.nativeSQL(sql);
-  }
-
-  public void setAutoCommit(boolean autoCommit) throws SQLException {
-    conn.setAutoCommit(autoCommit);
-  }
-
-  public boolean getAutoCommit() throws SQLException {
-    return conn.getAutoCommit();
-  }
-
-  public void commit() throws SQLException {
-    conn.commit();
-  }
-
-  public void rollback() throws SQLException {
-    conn.rollback();
-  }
-
-  public boolean isClosed() throws SQLException {
-    return conn.isClosed();
-  }
-
-  public DatabaseMetaData getMetaData() throws SQLException {
-    return conn.getMetaData();
-  }
-
-  public void setReadOnly(boolean readOnly) throws SQLException {
-    conn.setReadOnly(readOnly);
-  }
-
-  public boolean isReadOnly() throws SQLException {
-    return conn.isReadOnly();
-  }
-
-  public void setCatalog(String catalog) throws SQLException {
-    conn.setCatalog(catalog);
-  }
-
-  public String getCatalog() throws SQLException {
-    return conn.getCatalog();
-  }
-
-  public void setTransactionIsolation(int level) throws SQLException {
-    conn.setTransactionIsolation(level);
-  }
-
-  public int getTransactionIsolation() throws SQLException {
-    return conn.getTransactionIsolation();
-  }
-
-  public SQLWarning getWarnings() throws SQLException {
-    return conn.getWarnings();
-  }
-
-  public void clearWarnings() throws SQLException {
-    conn.clearWarnings();
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#createArrayOf(java.lang.String, java.lang.Object[])
-   */
-  @Override
-  public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
-    return conn.createArrayOf(typeName, elements);
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#createBlob()
-   */
-  @Override
-  public Blob createBlob() throws SQLException {
-    return createBlob();
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#createClob()
-   */
-  @Override
-  public Clob createClob() throws SQLException {
-    return conn.createClob();
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#createNClob()
-   */
-  @Override
-  public NClob createNClob() throws SQLException {
-    return conn.createNClob();
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#createSQLXML()
-   */
-  @Override
-  public SQLXML createSQLXML() throws SQLException {
-    return conn.createSQLXML();
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#createStatement(int, int)
-   */
-  @Override
-  public Statement createStatement(int resultSetType, int resultSetConcurrency)
-      throws SQLException {
-    return conn.createStatement(resultSetType, resultSetConcurrency);
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#createStatement(int, int, int)
-   */
-  @Override
-  public Statement createStatement(int resultSetType, int resultSetConcurrency,
-      int resultSetHoldability) throws SQLException {
-    return conn
-        .createStatement(resultSetType, resultSetConcurrency, resultSetHoldability);
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#createStruct(java.lang.String, java.lang.Object[])
-   */
-  @Override
-  public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
-    return conn.createStruct(typeName, attributes);
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#getClientInfo()
-   */
-  @Override
-  public Properties getClientInfo() throws SQLException {
-    return conn.getClientInfo();
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#getClientInfo(java.lang.String)
-   */
-  @Override
-  public String getClientInfo(String name) throws SQLException {
-    return conn.getClientInfo(name);
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#getHoldability()
-   */
-  @Override
-  public int getHoldability() throws SQLException {
-    return conn.getHoldability();
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#getTypeMap()
-   */
-  @Override
-  public Map<String, Class<?>> getTypeMap() throws SQLException {
-    // TODO Auto-generated method stub
-    return null;
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#isValid(int)
-   */
-  @Override
-  public boolean isValid(int timeout) throws SQLException {
-    // TODO Auto-generated method stub
-    return false;
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#prepareCall(java.lang.String, int, int)
-   */
-  @Override
-  public CallableStatement prepareCall(String sql, int resultSetType,
-      int resultSetConcurrency) throws SQLException {
-    // TODO Auto-generated method stub
-    return null;
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#prepareCall(java.lang.String, int, int, int)
-   */
-  @Override
-  public CallableStatement prepareCall(String sql, int resultSetType,
-      int resultSetConcurrency, int resultSetHoldability) throws SQLException {
-    // TODO Auto-generated method stub
-    return null;
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#prepareStatement(java.lang.String, int)
-   */
-  @Override
-  public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys)
-      throws SQLException {
-    // TODO Auto-generated method stub
-    return null;
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#prepareStatement(java.lang.String, int[])
-   */
-  @Override
-  public PreparedStatement prepareStatement(String sql, int[] columnIndexes)
-      throws SQLException {
-    // TODO Auto-generated method stub
-    return null;
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#prepareStatement(java.lang.String, java.lang.String[])
-   */
-  @Override
-  public PreparedStatement prepareStatement(String sql, String[] columnNames)
-      throws SQLException {
-    // TODO Auto-generated method stub
-    return null;
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#prepareStatement(java.lang.String, int, int)
-   */
-  @Override
-  public PreparedStatement prepareStatement(String sql, int resultSetType,
-      int resultSetConcurrency) throws SQLException {
-    // TODO Auto-generated method stub
-    return null;
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#prepareStatement(java.lang.String, int, int, int)
-   */
-  @Override
-  public PreparedStatement prepareStatement(String sql, int resultSetType,
-      int resultSetConcurrency, int resultSetHoldability) throws SQLException {
-    // TODO Auto-generated method stub
-    return null;
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#releaseSavepoint(java.sql.Savepoint)
-   */
-  @Override
-  public void releaseSavepoint(Savepoint savepoint) throws SQLException {
-    // TODO Auto-generated method stub
-
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#rollback(java.sql.Savepoint)
-   */
-  @Override
-  public void rollback(Savepoint savepoint) throws SQLException {
-    // TODO Auto-generated method stub
-
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#setClientInfo(java.util.Properties)
-   */
-  @Override
-  public void setClientInfo(Properties properties) throws SQLClientInfoException {
-    // TODO Auto-generated method stub
-
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#setClientInfo(java.lang.String, java.lang.String)
-   */
-  @Override
-  public void setClientInfo(String name, String value) throws SQLClientInfoException {
-    // TODO Auto-generated method stub
-
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#setHoldability(int)
-   */
-  @Override
-  public void setHoldability(int holdability) throws SQLException {
-    // TODO Auto-generated method stub
-
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#setSavepoint()
-   */
-  @Override
-  public Savepoint setSavepoint() throws SQLException {
-    // TODO Auto-generated method stub
-    return null;
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#setSavepoint(java.lang.String)
-   */
-  @Override
-  public Savepoint setSavepoint(String name) throws SQLException {
-    // TODO Auto-generated method stub
-    return null;
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Connection#setTypeMap(java.util.Map)
-   */
-  @Override
-  public void setTypeMap(Map<String, Class<?>> map) throws SQLException {
-    // TODO Auto-generated method stub
-
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Wrapper#isWrapperFor(java.lang.Class)
-   */
-  @Override
-  public boolean isWrapperFor(Class<?> iface) throws SQLException {
-    // TODO Auto-generated method stub
-    return false;
-  }
-
-  /*
-   * (non-Javadoc)
-   * @see java.sql.Wrapper#unwrap(java.lang.Class)
-   */
-  @Override
-  public <T> T unwrap(Class<T> iface) throws SQLException {
-    // TODO Auto-generated method stub
-    return null;
-  }
-}

src/bootswithdefer/JDCBPool/JDCConnectionDriver.java

@@ -1,63 +0,0 @@
-package bootswithdefer.JDCBPool;
-
-import java.sql.Connection;
-import java.sql.Driver;
-import java.sql.DriverManager;
-import java.sql.DriverPropertyInfo;
-import java.sql.SQLException;
-import java.util.Properties;
-
-/**
- * <b>Purpose:</b>Wrapper for JDBCConnectionDriver.<br>
- * <b>Description:</b>http://java.sun.com/developer/onlineTraining/Programming/JDCBook/
- * conpool.html<br>
- * <b>Copyright:</b>Licensed under the Apache License, Version 2.0.
- * http://www.apache.org/licenses/LICENSE-2.0<br>
- * <b>Company:</b> SIMPL<br>
- * 
- * @author schneimi
- * @version $Id: JDCConnectionDriver.java 1224 2010-04-28 14:17:34Z
- *          michael.schneidt@arcor.de $<br>
- * @link http://code.google.com/p/simpl09/
- */
-public class JDCConnectionDriver implements Driver {
-  public static final String URL_PREFIX = "jdbc:jdc:";
-  private static final int MAJOR_VERSION = 1;
-  private static final int MINOR_VERSION = 0;
-  private ConnectionService pool;
-
-  public JDCConnectionDriver(String driver, String url, String user, String password)
-      throws ClassNotFoundException, InstantiationException, IllegalAccessException,
-      SQLException {
-    DriverManager.registerDriver(this);
-    Class.forName(driver).newInstance();
-    pool = new ConnectionService(url, user, password);
-  }
-
-  public Connection connect(String url, Properties props) throws SQLException {
-    if (!url.startsWith(JDCConnectionDriver.URL_PREFIX)) {
-      return null;
-    }
-    return pool.getConnection();
-  }
-
-  public boolean acceptsURL(String url) {
-    return url.startsWith(JDCConnectionDriver.URL_PREFIX);
-  }
-
-  public int getMajorVersion() {
-    return JDCConnectionDriver.MAJOR_VERSION;
-  }
-
-  public int getMinorVersion() {
-    return JDCConnectionDriver.MINOR_VERSION;
-  }
-
-  public DriverPropertyInfo[] getPropertyInfo(String str, Properties props) {
-    return new DriverPropertyInfo[0];
-  }
-
-  public boolean jdbcCompliant() {
-    return false;
-  }
-}