org.firebirdsql.pool.BasicAbstractConnectionPool Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jaybird-jdk15 Show documentation
Show all versions of jaybird-jdk15 Show documentation
JDBC Driver for the Firebird RDBMS
/*
* Firebird Open Source J2ee connector - jdbc driver
*
* Distributable under LGPL license.
* You may obtain a copy of the License at http://www.gnu.org/copyleft/lgpl.html
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* LGPL License for more details.
*
* This file was created by members of the firebird development team.
* All individual contributions remain the Copyright (C) of those
* individuals. Contributors to this file are either listed here or
* can be obtained from a CVS history command.
*
* All rights reserved.
*/
package org.firebirdsql.pool;
import java.io.*;
import java.sql.SQLException;
import javax.naming.*;
import javax.sql.ConnectionPoolDataSource;
import javax.sql.PooledConnection;
/**
* Base class for connection pool implementations. Main feature of this class is
* that it implements {@link org.firebirdsql.pool.ConnectionPoolConfiguration}
* interface and releives developers from creating getters and setters for
* pool configuration parameters. Additionally this class provides basic
* functionality for JNDI-enabled connection pools.
*
* No other functionality is available.
*
* @author Roman Rokytskyy
*/
public abstract class BasicAbstractConnectionPool
extends AbstractConnectionPool
implements ConnectionPoolConfiguration, ConnectionPoolDataSource,
Serializable, Referenceable
{
/*
* Following fields contain information about the pool characteristics.
*/
private int minPoolSize = FBPoolingDefaults.DEFAULT_MIN_SIZE;
private int maxPoolSize = FBPoolingDefaults.DEFAULT_MAX_SIZE;
private int blockingTimeout = FBPoolingDefaults.DEFAULT_BLOCKING_TIMEOUT;
private int retryInterval = FBPoolingDefaults.DEFAULT_RETRY_INTERVAL;
private int maxIdleTime = FBPoolingDefaults.DEFAULT_IDLE_TIMEOUT;
private int pingInterval = FBPoolingDefaults.DEFAULT_PING_INTERVAL;
private String pingStatement;
private boolean pooling = true;
private boolean statementPooling = true;
private boolean keepStatements = true;
private int maxStatements = FBPoolingDefaults.DEFAULT_MAX_STATEMENTS;
private Reference reference;
/**
* Create instance of this class. Default constructor introduced to make
* it available to subclasses.
*/
protected BasicAbstractConnectionPool() {
super();
}
public abstract int getLoginTimeout() throws SQLException;
public abstract void setLoginTimeout(int seconds) throws SQLException;
public abstract PrintWriter getLogWriter() throws SQLException;
public abstract void setLogWriter(PrintWriter printWriter) throws SQLException;
public abstract PooledConnection getPooledConnection() throws SQLException;
public abstract PooledConnection getPooledConnection(
String user, String password) throws SQLException;
public ConnectionPoolConfiguration getConfiguration() {
return this;
}
public int getBlockingTimeout() {
return blockingTimeout;
}
public void setBlockingTimeout(int blockingTimeout) {
this.blockingTimeout = blockingTimeout;
}
/**
* @deprecated non-standard name, use {@link #getMaxIdleTime()}
*/
public int getIdleTimeout() {
return getMaxIdleTime();
}
/**
* @deprecated non-standard name, use {@link #setMaxIdleTime(int)}
*/
public void setIdleTimeout(int idleTimeout) {
setMaxIdleTime(idleTimeout);
}
public int getMaxIdleTime() {
return maxIdleTime;
}
public void setMaxIdleTime(int maxIdleTime) {
this.maxIdleTime = maxIdleTime;
}
/**
* @deprecated non-standard name, use {@link #getMaxPoolSize()}
*/
public int getMaxConnections() {
return getMaxPoolSize();
}
/**
* @deprecated non-standard name, use {@link #setMaxPoolSize(int)}
*/
public void setMaxConnections(int maxConnections) {
setMaxPoolSize(maxConnections);
}
public int getMaxPoolSize() {
return maxPoolSize;
}
public void setMaxPoolSize(int maxPoolSize) {
this.maxPoolSize = maxPoolSize;
}
/**
* @deprecated non-standard name, use {@link #getMinPoolSize()}
*/
public int getMinConnections() {
return getMinPoolSize();
}
/**
* @deprecated non-standard name, use {@link #setMinPoolSize(int)}
*/
public void setMinConnections(int minConnections) {
setMinPoolSize(minConnections);
}
public int getMinPoolSize() {
return minPoolSize;
}
public void setMinPoolSize(int minPoolSize) {
this.minPoolSize = minPoolSize;
}
public int getPingInterval() {
return pingInterval;
}
public void setPingInterval(int pingInterval) {
this.pingInterval = pingInterval;
}
public String getPingStatement() {
return pingStatement;
}
public void setPingStatement(String pingStatement) {
this.pingStatement = pingStatement;
}
public int getRetryInterval() {
return retryInterval;
}
public void setRetryInterval(int retryInterval) {
this.retryInterval = retryInterval;
}
public boolean isPingable() {
return getPingInterval() > 0 && getPingStatement() != null;
}
public boolean isPooling() {
return pooling;
}
public void setPooling(boolean pooling) {
this.pooling = pooling;
}
public boolean isStatementPooling() {
return statementPooling;
}
public void setStatementPooling(boolean statementPooling) {
// no statement pooling if max allowed statements is 0
if (getMaxStatements() == 0)
statementPooling = false;
this.statementPooling = statementPooling;
}
public boolean isKeepStatements() {
return keepStatements;
}
public void setKeepStatements(boolean keepStatements) {
this.keepStatements = keepStatements;
}
public int getMaxStatements() {
return maxStatements;
}
public void setMaxStatements(int maxStatements) {
this.maxStatements = maxStatements;
if (maxStatements > 0 && !isStatementPooling())
setStatementPooling(true);
else
if (maxStatements == 0)
setStatementPooling(false);
}
private static final String REF_BLOCKING_TIMEOUT = "blockingTimeout";
private static final String REF_RETRY_INTERVAL = "retryInterval";
private static final String REF_LOGIN_TIMEOUT = "loginTimeout";
private static final String REF_PING_INTERVAL = "pingInterval";
private static final String REF_PING_STATEMENT = "pingStatement";
private static final String REF_POOLING = "pooling";
private static final String REF_STATEMENT_POOLING = "statementPooling";
private static final String REF_MAX_STATEMENTS = "maxStatements";
private static final String REF_MAX_POOL_SIZE = "maxPoolSize";
private static final String REF_MIN_POOL_SIZE = "minPoolSize";
private static final String REF_MAX_IDLE_TIME = "maxIdleTime";
private static final String REF_MAX_CONNECTIONS = "maxConnections";
private static final String REF_MIN_CONNECTIONS = "minConnections";
private static final String REF_IDLE_TIMEOUT = "idleTimeout";
protected abstract BasicAbstractConnectionPool createObjectInstance();
/**
* Get object instance for the specified name in the specified context.
* This method constructs new datasource if obj represents
* {@link Reference}, whose factory class is equal to this class.
*/
public Object getObjectInstance(Object obj) throws Exception
{
if (!(obj instanceof Reference)) return null;
Reference ref = (Reference)obj;
if (!getClass().getName().equals(ref.getClassName()))
return null;
BasicAbstractConnectionPool ds = createObjectInstance();
int[] addressesToRemove = new int[ref.size()];
for (int i = 0; i < ref.size(); i++) {
RefAddr element = ref.get(i);
String type = element.getType();
String addr = element.getContent().toString();
if (REF_BLOCKING_TIMEOUT.equals(type))
ds.setBlockingTimeout(Integer.parseInt(addr));
else
if (REF_MAX_IDLE_TIME.equals(type))
ds.setMaxIdleTime(Integer.parseInt(addr));
else
if (REF_IDLE_TIMEOUT.equals(type))
ds.setMaxIdleTime(Integer.parseInt(addr));
else
if (REF_LOGIN_TIMEOUT.equals(type))
ds.setLoginTimeout(Integer.parseInt(addr));
else
if (REF_MAX_POOL_SIZE.equals(type))
ds.setMaxPoolSize(Integer.parseInt(addr));
else
if (REF_MIN_POOL_SIZE.equals(type))
ds.setMinPoolSize(Integer.parseInt(addr));
else
if (REF_MAX_CONNECTIONS.equals(type))
ds.setMaxPoolSize(Integer.parseInt(addr));
else
if (REF_MIN_CONNECTIONS.equals(type))
ds.setMinPoolSize(Integer.parseInt(addr));
else
if (REF_PING_INTERVAL.equals(type))
ds.setPingInterval(Integer.parseInt(addr));
else
if (REF_RETRY_INTERVAL.equals(type))
ds.setRetryInterval(Integer.parseInt(addr));
else
if (REF_PING_STATEMENT.equals(type))
ds.setPingStatement(addr);
else
if (REF_POOLING.equals(type))
ds.setPooling(Boolean.valueOf(addr).booleanValue());
else
if (REF_STATEMENT_POOLING.equals(type))
ds.setStatementPooling(Boolean.valueOf(addr).booleanValue());
else
if (REF_MAX_STATEMENTS.equals(type))
ds.setMaxStatements(Integer.parseInt(addr));
else
continue;
// set flag that we matched the address, so it has to be removed
// we rely on fact that if none address was matched, last else
// clause will be executed and next code will not be executed.
addressesToRemove[i] = 1;
}
// removed matched addresses
for (int i = addressesToRemove.length - 1; i >= 0 ; i--) {
if (addressesToRemove[i] == 1)
ref.remove(i);
}
return ds;
}
protected String getRefAddr(Reference ref, String type) {
RefAddr addr = ref.get(type);
if (addr == null)
return null;
else
return addr.getContent().toString();
}
/**
* Get JDNI reference.
*
* @return instance of {@link Reference}.
*/
public Reference getReference() {
if (reference == null)
return getDefaultReference();
else
return reference;
}
/**
* Set JNDI reference for this data source.
*
* @param reference JNDI reference.
*/
public void setReference(Reference reference) {
this.reference = reference;
}
/**
* Get default JNDI reference for this datasource. This method is called if
* datasource is used in non-JCA environment.
*
* @return instance of {@link Reference} containing all information
* that allows to reconstruct the datasource.
*/
public Reference getDefaultReference() {
Reference ref = new Reference(getClass().getName(),
getClass().getName(), null);
if (getBlockingTimeout() != FBPoolingDefaults.DEFAULT_BLOCKING_TIMEOUT)
ref.add(new StringRefAddr(REF_BLOCKING_TIMEOUT,
String.valueOf(getBlockingTimeout())));
if (getMaxIdleTime() != FBPoolingDefaults.DEFAULT_IDLE_TIMEOUT)
ref.add(new StringRefAddr(REF_MAX_IDLE_TIME,
String.valueOf(getMaxIdleTime())));
if (getMaxPoolSize() != FBPoolingDefaults.DEFAULT_MAX_SIZE)
ref.add(new StringRefAddr(REF_MAX_POOL_SIZE,
String.valueOf(getMaxPoolSize())));
if (getMinPoolSize() != FBPoolingDefaults.DEFAULT_MIN_SIZE)
ref.add(new StringRefAddr(REF_MIN_POOL_SIZE,
String.valueOf(getMinPoolSize())));
if (getPingInterval() != FBPoolingDefaults.DEFAULT_PING_INTERVAL)
ref.add(new StringRefAddr(REF_PING_INTERVAL,
String.valueOf(getPingInterval())));
if (getRetryInterval() != FBPoolingDefaults.DEFAULT_RETRY_INTERVAL)
ref.add(new StringRefAddr(REF_RETRY_INTERVAL,
String.valueOf(getRetryInterval())));
if (getPingStatement() != null)
ref.add(new StringRefAddr(REF_PING_STATEMENT,
String.valueOf(getPingStatement())));
if (!isPooling())
ref.add(new StringRefAddr(REF_POOLING,
String.valueOf(isPooling())));
if (!isStatementPooling())
ref.add(new StringRefAddr(REF_STATEMENT_POOLING,
String.valueOf(isStatementPooling())));
if (getMaxStatements() != FBPoolingDefaults.DEFAULT_MAX_STATEMENTS)
ref.add(new StringRefAddr(REF_MAX_STATEMENTS,
String.valueOf(getMaxStatements())));
return ref;
}
public static byte[] serialize(Object obj) {
ByteArrayOutputStream bout = new ByteArrayOutputStream();
try {
ObjectOutputStream out = new ObjectOutputStream(bout);
out.writeObject(obj);
out.flush();
} catch(IOException ex) {
return null;
}
return bout.toByteArray();
}
public static Object deserialize(byte[] data) {
ByteArrayInputStream bin = new ByteArrayInputStream(data);
try {
ObjectInputStream in = new ObjectInputStream(bin);
return in.readObject();
} catch(IOException ex) {
return null;
} catch(ClassNotFoundException ex) {
return null;
}
}
}