/*
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* The contents of this file are subject to the terms of the Common Development and
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* Distribution License (the License). You may not use this file except in compliance with the
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* License.
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*
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* You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
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* specific language governing permission and limitations under the License.
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*
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* When distributing Covered Software, include this CDDL Header Notice in each file and include
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* the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
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* Header, with the fields enclosed by brackets [] replaced by your own identifying
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* information: "Portions Copyright [year] [name of copyright owner]".
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*
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* Copyright 2024-2025 3A Systems, LLC.
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*/
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package org.opends.server.backends.jdbc;
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import com.google.common.cache.*;
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import java.sql.*;
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import java.util.LinkedList;
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import java.util.Map;
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import java.util.Properties;
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import java.util.Queue;
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import java.util.concurrent.*;
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public class CachedConnection implements Connection {
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final Connection parent;
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static LoadingCache<String, BlockingQueue<CachedConnection>> cached= CacheBuilder.newBuilder()
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.expireAfterAccess(Long.parseLong(System.getProperty("org.openidentityplatform.opendj.jdbc.ttl","15000")), TimeUnit.MILLISECONDS)
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.removalListener(new RemovalListener<String, BlockingQueue<CachedConnection>>() {
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@Override
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public void onRemoval(RemovalNotification<String, BlockingQueue<CachedConnection>> notification) {
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assert notification.getValue() != null;
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for (CachedConnection con: notification.getValue()) {
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try {
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if (!con.isClosed()) {
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con.parent.close();
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}
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} catch (SQLException e) {
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}
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}
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}
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})
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.build(new CacheLoader<String, BlockingQueue<CachedConnection>>() {
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@Override
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public BlockingQueue<CachedConnection> load(String connectionString) throws Exception {
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return new LinkedBlockingQueue<>();
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}
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});
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final String connectionString;
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public CachedConnection(String connectionString,Connection parent) {
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this.connectionString=connectionString;
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this.parent = parent;
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}
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static Connection getConnection(String connectionString) throws Exception {
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return getConnection(connectionString,0);
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}
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static Connection getConnection(String connectionString, final int waitTime) throws Exception {
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CachedConnection con=cached.get(connectionString).poll(waitTime,TimeUnit.MILLISECONDS);
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while(con!=null) {
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if (!con.isValid(0)) {
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try {
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con.parent.close();
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} catch (SQLException e) {
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con=null;
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}
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con=cached.get(connectionString).poll();
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}else{
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return con;
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}
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}
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try {
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final Connection conNew= DriverManager.getConnection(connectionString);
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conNew.setAutoCommit(false);
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conNew.setTransactionIsolation(TRANSACTION_READ_COMMITTED);
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return new CachedConnection(connectionString, conNew);
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}catch (SQLException e) { //max_connection server error: try recursion for reuse connection
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return getConnection(connectionString,(waitTime==0)?1:waitTime*2);
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}
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}
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@Override
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public Statement createStatement() throws SQLException {
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return parent.createStatement();
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}
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@Override
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public PreparedStatement prepareStatement(String sql) throws SQLException {
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return parent.prepareStatement(sql);
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}
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@Override
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public CallableStatement prepareCall(String sql) throws SQLException {
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return parent.prepareCall(sql);
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}
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@Override
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public String nativeSQL(String sql) throws SQLException {
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return parent.nativeSQL(sql);
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}
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@Override
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public void setAutoCommit(boolean autoCommit) throws SQLException {
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parent.setAutoCommit(autoCommit);
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}
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@Override
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public boolean getAutoCommit() throws SQLException {
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return parent.getAutoCommit();
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}
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@Override
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public void commit() throws SQLException {
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parent.commit();
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}
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@Override
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public void rollback() throws SQLException {
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parent.rollback();
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}
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@Override
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public void close() throws SQLException {
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rollback();
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try {
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cached.get(connectionString).add(this);
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} catch (ExecutionException e) {
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throw new RuntimeException(e);
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}
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}
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@Override
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public boolean isClosed() throws SQLException {
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return parent.isClosed();
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}
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@Override
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public DatabaseMetaData getMetaData() throws SQLException {
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return parent.getMetaData();
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}
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@Override
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public void setReadOnly(boolean readOnly) throws SQLException {
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parent.setReadOnly(readOnly);
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}
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@Override
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public boolean isReadOnly() throws SQLException {
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return parent.isReadOnly();
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}
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@Override
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public void setCatalog(String catalog) throws SQLException {
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parent.setCatalog(catalog);
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}
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@Override
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public String getCatalog() throws SQLException {
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return parent.getCatalog();
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}
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@Override
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public void setTransactionIsolation(int level) throws SQLException {
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parent.setTransactionIsolation(level);
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}
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@Override
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public int getTransactionIsolation() throws SQLException {
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return parent.getTransactionIsolation();
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}
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@Override
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public SQLWarning getWarnings() throws SQLException {
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return parent.getWarnings();
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}
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@Override
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public void clearWarnings() throws SQLException {
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parent.clearWarnings();
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}
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@Override
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public Statement createStatement(int resultSetType, int resultSetConcurrency) throws SQLException {
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return parent.createStatement(resultSetType, resultSetConcurrency);
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}
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@Override
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public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
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return parent.prepareStatement(sql, resultSetType, resultSetConcurrency);
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}
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@Override
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public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
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return parent.prepareCall(sql, resultSetType, resultSetConcurrency) ;
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}
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@Override
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public Map<String, Class<?>> getTypeMap() throws SQLException {
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return parent.getTypeMap();
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}
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@Override
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public void setTypeMap(Map<String, Class<?>> map) throws SQLException {
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parent.setTypeMap(map);
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}
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@Override
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public void setHoldability(int holdability) throws SQLException {
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parent.setHoldability(holdability);
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}
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@Override
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public int getHoldability() throws SQLException {
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return parent.getHoldability();
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}
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@Override
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public Savepoint setSavepoint() throws SQLException {
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return parent.setSavepoint();
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}
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@Override
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public Savepoint setSavepoint(String name) throws SQLException {
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return parent.setSavepoint(name);
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}
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@Override
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public void rollback(Savepoint savepoint) throws SQLException {
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parent.rollback(savepoint);
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}
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@Override
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public void releaseSavepoint(Savepoint savepoint) throws SQLException {
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parent.releaseSavepoint(savepoint);
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}
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@Override
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public Statement createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
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return parent.createStatement(resultSetType, resultSetConcurrency, resultSetHoldability);
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}
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@Override
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public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
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return parent.prepareStatement(sql, resultSetType, resultSetConcurrency, resultSetHoldability);
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}
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@Override
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public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
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return parent.prepareCall(sql, resultSetType, resultSetConcurrency, resultSetHoldability);
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}
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@Override
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public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys) throws SQLException {
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return parent.prepareStatement(sql, autoGeneratedKeys);
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}
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@Override
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public PreparedStatement prepareStatement(String sql, int[] columnIndexes) throws SQLException {
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return parent.prepareStatement(sql, columnIndexes);
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}
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@Override
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public PreparedStatement prepareStatement(String sql, String[] columnNames) throws SQLException {
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return parent.prepareStatement(sql, columnNames);
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}
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@Override
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public Clob createClob() throws SQLException {
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return parent.createClob();
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}
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@Override
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public Blob createBlob() throws SQLException {
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return parent.createBlob();
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}
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@Override
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public NClob createNClob() throws SQLException {
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return parent.createNClob();
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}
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@Override
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public SQLXML createSQLXML() throws SQLException {
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return parent.createSQLXML();
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}
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@Override
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public boolean isValid(int timeout) throws SQLException {
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return parent.isValid(timeout);
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}
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@Override
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public void setClientInfo(String name, String value) throws SQLClientInfoException {
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parent.setClientInfo(name, value);
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}
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@Override
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public void setClientInfo(Properties properties) throws SQLClientInfoException {
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parent.setClientInfo(properties);
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}
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@Override
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public String getClientInfo(String name) throws SQLException {
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return parent.getClientInfo(name);
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}
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@Override
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public Properties getClientInfo() throws SQLException {
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return parent.getClientInfo();
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}
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@Override
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public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
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return parent.createArrayOf(typeName, elements);
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}
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@Override
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public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
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return parent.createStruct(typeName, attributes);
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}
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@Override
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public void setSchema(String schema) throws SQLException {
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parent.setSchema(schema);
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}
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@Override
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public String getSchema() throws SQLException {
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return parent.getSchema();
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}
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@Override
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public void abort(Executor executor) throws SQLException {
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parent.abort(executor);
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}
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@Override
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public void setNetworkTimeout(Executor executor, int milliseconds) throws SQLException {
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parent.setNetworkTimeout(executor, milliseconds);
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}
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@Override
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public int getNetworkTimeout() throws SQLException {
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return parent.getNetworkTimeout();
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}
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@Override
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public <T> T unwrap(Class<T> iface) throws SQLException {
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return parent.unwrap(iface);
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}
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@Override
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public boolean isWrapperFor(Class<?> iface) throws SQLException {
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return parent.isWrapperFor(iface);
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}
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}
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