/*
* 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.synapse.mediators.db;
import org.apache.commons.dbcp.BasicDataSource;
import org.apache.commons.dbcp.datasources.PerUserPoolDataSource;
import org.apache.commons.logging.LogFactory;
import org.apache.synapse.ManagedLifecycle;
import org.apache.synapse.MessageContext;
import org.apache.synapse.SynapseException;
import org.apache.synapse.SynapseLog;
import org.apache.synapse.commons.datasource.*;
import org.apache.synapse.commons.datasource.factory.DataSourceFactory;
import org.apache.synapse.commons.jmx.MBeanRepository;
import org.apache.synapse.securevault.secret.SecretManager;
import org.apache.synapse.core.SynapseEnvironment;
import org.apache.synapse.mediators.AbstractMediator;
import javax.naming.Context;
import javax.sql.DataSource;
import javax.xml.namespace.QName;
import java.math.BigDecimal;
import java.sql.*;
import java.sql.Date;
import java.util.*;
/**
* This abstract DB mediator will perform common DB connection pooling etc. for all DB mediators
*/
public abstract class AbstractDBMediator extends AbstractMediator implements ManagedLifecycle {
/** The information needed to create a data source */
private DataSourceInformation dataSourceInformation;
/** The name of the data source to lookup. */
private String dataSourceName;
/** The information needed to lookup a data source from a JNDI provider */
private Properties jndiProperties = new Properties();
/** The DataSource to get DB connections */
private DataSource dataSource;
/** MBean for DBPool monitoring */
private DBPoolView dbPoolView;
/** Statements */
private final List<Statement> statementList = new ArrayList<Statement>();
/** Map to store the pool configuration for de-serialization */
private Map<Object, String> dataSourceProps = new HashMap<Object, String>();
/**
* Initializes the mediator - either an existing data source will be looked up
* from an in- or external JNDI provider or a custom data source will be created
* based on the provide configuration (using Apache DBCP).
*
* @param se the Synapse environment reference
*/
public void init(SynapseEnvironment se) {
// check whether we shall try to lookup an existing data source or create a new custom data source
if (dataSourceName != null) {
dataSource = lookupDataSource(dataSourceName, jndiProperties);
} else if (dataSourceInformation != null) {
dataSource = createCustomDataSource(dataSourceInformation);
}
}
/**
* Destroys the mediator. If we are using our custom DataSource, then shut down the connections
*/
public void destroy() {
if (this.dataSource instanceof BasicDataSource) {
try {
((BasicDataSource) this.dataSource).close();
log.info("Successfully shut down DB connection pool for URL : " + getDSName());
} catch (SQLException e) {
log.warn("Error shutting down DB connection pool for URL : " + getDSName());
}
} else if (this.dataSource instanceof PerUserPoolDataSource) {
((PerUserPoolDataSource) this.dataSource).close();
log.info("Successfully shut down DB connection pool for URL : " + getDSName());
}
}
/**
* Process each SQL statement against the current message
* @param synCtx the current message
* @return true, always
*/
public boolean mediate(MessageContext synCtx) {
String name = (this instanceof DBLookupMediator ? "DBLookup" : "DBReport");
SynapseLog synLog = getLog(synCtx);
if (synLog.isTraceOrDebugEnabled()) {
synLog.traceOrDebug("Start : " + name + " mediator");
if (synLog.isTraceTraceEnabled()) {
synLog.traceTrace("Message : " + synCtx.getEnvelope());
}
}
for (Statement aStatement : statementList) {
if (aStatement != null) {
processStatement(aStatement, synCtx);
}
}
if (synLog.isTraceOrDebugEnabled()) {
synLog.traceOrDebug("End : " + name + " mediator");
}
return true;
}
/**
* Subclasses must specify how each SQL statement is processed
* @param query the SQL statement
* @param msgCtx current message
*/
abstract protected void processStatement(Statement query, MessageContext msgCtx);
/**
* Return the name or (hopefully) unique connection URL specific to the DataSource being used
* This is used for logging purposes only
* @return a unique name or URL to refer to the DataSource being used
*/
protected String getDSName() {
if (dataSourceName != null) {
return dataSourceName;
} else if (dataSourceInformation != null) {
String name = dataSourceInformation.getUrl();
if (name == null) {
name = dataSourceInformation.getDatasourceName();
}
return name;
}
return null;
}
public void setDataSourceInformation(DataSourceInformation dataSourceInformation) {
this.dataSourceInformation = dataSourceInformation;
}
public void setJndiProperties(Properties jndiProperties) {
this.jndiProperties = jndiProperties;
}
public DataSource getDataSource() {
return dataSource;
}
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
}
public void setDataSourceName(String dataSourceName) {
this.dataSourceName = dataSourceName;
}
public void addDataSourceProperty(QName name, String value) {
dataSourceProps.put(name, value);
}
public void addDataSourceProperty(String name, String value) {
dataSourceProps.put(name, value);
}
public void addStatement(Statement stmnt) {
statementList.add(stmnt);
}
public List<Statement> getStatementList() {
return statementList;
}
public DBPoolView getDbPoolView() {
return dbPoolView;
}
public void setDbPoolView(DBPoolView dbPoolView) {
this.dbPoolView = dbPoolView;
}
/**
* Return a Prepared statement for the given Statement object, which is ready to be executed
* @param stmnt SQL stataement to be executed
* @param msgCtx Current message context
* @return a PreparedStatement
* @throws SQLException on error
*/
protected PreparedStatement getPreparedStatement(Statement stmnt,
MessageContext msgCtx) throws SQLException {
SynapseLog synLog = getLog(msgCtx);
if (synLog.isTraceOrDebugEnabled()) {
synLog.traceOrDebug("Getting a connection from DataSource " + getDSName() +
" and preparing statement : " + stmnt.getRawStatement());
}
Connection con = getDataSource().getConnection();
if (con == null) {
String msg = "Connection from DataSource " + getDSName() + " is null.";
log.error(msg);
throw new SynapseException(msg);
}
if (dataSource instanceof BasicDataSource) {
BasicDataSource basicDataSource = (BasicDataSource) dataSource;
int numActive = basicDataSource.getNumActive();
int numIdle = basicDataSource.getNumIdle();
String connectionId = Integer.toHexString(con.hashCode());
DBPoolView dbPoolView = getDbPoolView();
if (dbPoolView != null) {
dbPoolView.setNumActive(numActive);
dbPoolView.setNumIdle(numIdle);
dbPoolView.updateConnectionUsage(connectionId);
}
if (synLog.isTraceOrDebugEnabled()) {
synLog.traceOrDebug("[ DB Connection : " + con + " ]");
synLog.traceOrDebug("[ DB Connection instance identifier : " +
connectionId + " ]");
synLog.traceOrDebug("[ Number of Active Connection : " + numActive + " ]");
synLog.traceOrDebug("[ Number of Idle Connection : " + numIdle + " ]");
}
}
PreparedStatement ps = con.prepareStatement(stmnt.getRawStatement());
// set parameters if any
List<Statement.Parameter> params = stmnt.getParameters();
int column = 1;
for (Statement.Parameter param : params) {
if (param == null) {
continue;
}
String value = (param.getPropertyName() != null ?
param.getPropertyName() : param.getXpath().stringValueOf(msgCtx));
if (synLog.isTraceOrDebugEnabled()) {
synLog.traceOrDebug("Setting as parameter : " + column + " value : " + value +
" as JDBC Type : " + param.getType() + "(see java.sql.Types for valid " +
"types)");
}
switch (param.getType()) {
// according to J2SE 1.5 /docs/guide/jdbc/getstart/mapping.html
case Types.CHAR:
case Types.VARCHAR:
case Types.LONGVARCHAR: {
ps.setString(column++, value);
break;
}
case Types.NUMERIC:
case Types.DECIMAL: {
ps.setBigDecimal(column++, new BigDecimal(value));
break;
}
case Types.BIT: {
ps.setBoolean(column++, Boolean.parseBoolean(value));
break;
}
case Types.TINYINT: {
ps.setByte(column++, Byte.parseByte(value));
break;
}
case Types.SMALLINT: {
ps.setShort(column++, Short.parseShort(value));
break;
}
case Types.INTEGER: {
ps.setInt(column++, Integer.parseInt(value));
break;
}
case Types.BIGINT: {
ps.setLong(column++, Long.parseLong(value));
break;
}
case Types.REAL: {
ps.setFloat(column++, Float.parseFloat(value));
break;
}
case Types.FLOAT: {
ps.setDouble(column++, Double.parseDouble(value));
break;
}
case Types.DOUBLE: {
ps.setDouble(column++, Double.parseDouble(value));
break;
}
// skip BINARY, VARBINARY and LONGVARBINARY
case Types.DATE: {
ps.setDate(column++, Date.valueOf(value));
break;
}
case Types.TIME: {
ps.setTime(column++, Time.valueOf(value));
break;
}
case Types.TIMESTAMP: {
ps.setTimestamp(column++, Timestamp.valueOf(value));
break;
}
// skip CLOB, BLOB, ARRAY, DISTINCT, STRUCT, REF, JAVA_OBJECT
default: {
String msg = "Trying to set an un-supported JDBC Type : " + param.getType() +
" against column : " + column + " and statement : " +
stmnt.getRawStatement() +
" used by a DB mediator against DataSource : " + getDSName() +
" (see java.sql.Types for valid type values)";
handleException(msg, msgCtx);
}
}
}
if (synLog.isTraceOrDebugEnabled()) {
synLog.traceOrDebug("Successfully prepared statement : " + stmnt.getRawStatement() +
" against DataSource : " + getDSName());
}
return ps;
}
/**
* Lookup the DataSource on JNDI using the specified name and optional properties
*
* @param dataSourceName the name of the data source to lookup
* @param jndiProperties the JNDI properties identifying a data source provider
*
* @return a DataSource looked up using the specified JNDI properties
*/
private DataSource lookupDataSource(String dataSourceName, Properties jndiProperties) {
DataSource dataSource = null;
RepositoryBasedDataSourceFinder finder = DataSourceRepositoryHolder.getInstance()
.getRepositoryBasedDataSourceFinder();
if (finder.isInitialized()) {
// first try a lookup based on the data source name only
dataSource = finder.find(dataSourceName);
}
if (dataSource == null) {
// decrypt the password if needed
String password = jndiProperties.getProperty(Context.SECURITY_CREDENTIALS);
if (password != null && !"".equals(password)) {
jndiProperties.put(Context.SECURITY_CREDENTIALS, getActualPassword(password));
}
// lookup the data source using the specified jndi properties
dataSource = DataSourceFinder.find(dataSourceName, jndiProperties);
if (dataSource == null) {
handleException("Cannot find a DataSource " + dataSourceName + " for given JNDI" +
" properties :" + jndiProperties);
}
}
MBeanRepository mBeanRepository = DatasourceMBeanRepository.getInstance();
Object mBean = mBeanRepository.getMBean(dataSourceName);
if (mBean instanceof DBPoolView) {
setDbPoolView((DBPoolView) mBean);
}
log.info("Successfully looked up datasource " + dataSourceName + ".");
return dataSource;
}
/**
* Create a custom DataSource using the specified data source information.
*
* @param dataSourceInformation the data source information to create a data source
*
* @return a DataSource created using specified properties
*/
protected DataSource createCustomDataSource(DataSourceInformation dataSourceInformation) {
DataSource dataSource = DataSourceFactory.createDataSource(dataSourceInformation);
if (dataSource != null) {
log.info("Successfully created data source for " + dataSourceInformation.getUrl() + ".");
}
return dataSource;
}
/**
* Get the password from SecretManager . here only use SecretManager
*
* @param aliasPasword alias password
* @return if the SecretManager is initiated , then , get the corresponding secret
* , else return alias itself
*/
private String getActualPassword(String aliasPasword) {
SecretManager secretManager = SecretManager.getInstance();
if (secretManager.isInitialized()) {
return secretManager.getSecret(aliasPasword);
}
return aliasPasword;
}
protected void handleException(String message) {
LogFactory.getLog(this.getClass()).error(message);
throw new SynapseException(message);
}
public Map<Object, String> getDataSourceProps() {
return dataSourceProps;
}
}