/*
* 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.jmeter.protocol.jdbc.sampler;
import java.lang.reflect.Field;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import org.apache.avalon.excalibur.datasource.DataSourceComponent;
import org.apache.jmeter.samplers.AbstractSampler;
import org.apache.jmeter.samplers.Entry;
import org.apache.jmeter.samplers.SampleResult;
import org.apache.jmeter.testbeans.TestBean;
import org.apache.jmeter.util.JMeterUtils;
import org.apache.jorphan.collections.Data;
import org.apache.jorphan.logging.LoggingManager;
import org.apache.log.Logger;
/**
* A sampler which understands JDBC database requests.
*
* @author Original author unknown
* @author <a href="mailto:jeremy_a@bigfoot.com">Jeremy Arnold</a>
*/
public class JDBCSampler extends AbstractSampler implements TestBean {
private static final Logger log = LoggingManager.getLoggerForClass();
// This value is used for both the connection (perConnCache) and statement (preparedStatementMap) caches.
// TODO - do they have to be the same size?
private static final int MAX_ENTRIES =
JMeterUtils.getPropDefault("jdbcsampler.cachesize",200); // $NON-NLS-1$
private static final Map mapJdbcNameToInt;
static {
// based on e291. Getting the Name of a JDBC Type from javaalmanac.com
// http://javaalmanac.com/egs/java.sql/JdbcInt2Str.html
mapJdbcNameToInt = new HashMap();
//Get all fields in java.sql.Types and store the corresponding int values
Field[] fields = java.sql.Types.class.getFields();
for (int i=0; i<fields.length; i++) {
try {
String name = fields[i].getName();
Integer value = (Integer)fields[i].get(null);
mapJdbcNameToInt.put(name.toLowerCase(),value);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
}
}
}
// Query types (used to communicate with GUI)
static final String SELECT = "Select Statement"; // $NON-NLS-1$
static final String UPDATE = "Update Statement"; // $NON-NLS-1$
static final String CALLABLE = "Callable Statement"; // $NON-NLS-1$
static final String PREPARED_SELECT = "Prepared Select Statement"; // $NON-NLS-1$
static final String PREPARED_UPDATE = "Prepared Update Statement"; // $NON-NLS-1$
static final String COMMIT = "Commit"; // $NON-NLS-1$
static final String ROLLBACK = "Rollback"; // $NON-NLS-1$
static final String AUTOCOMMIT_FALSE = "AutoCommit(false)"; // $NON-NLS-1$
static final String AUTOCOMMIT_TRUE = "AutoCommit(true)"; // $NON-NLS-1$
private String query = ""; // $NON-NLS-1$
private String dataSource = ""; // $NON-NLS-1$
private String queryType = SELECT;
private String queryArguments = ""; // $NON-NLS-1$
private String queryArgumentsTypes = ""; // $NON-NLS-1$
/**
* Cache of PreparedStatements stored in a per-connection basis. Each entry of this
* cache is another Map mapping the statement string to the actual PreparedStatement.
* The cache has a fixed size of MAX_ENTRIES and it will throw aways all PreparedStatements
* from the least recently used connections.
*/
private static Map perConnCache = new LinkedHashMap(MAX_ENTRIES){
protected boolean removeEldestEntry(java.util.Map.Entry arg0) {
if (size() > MAX_ENTRIES) {
final Object value = arg0.getValue();
if (value instanceof Map) {
closeAllStatements(((Map)value).values());
}
return true;
}
return false;
}
};
/**
* Creates a JDBCSampler.
*/
public JDBCSampler() {
}
public SampleResult sample(Entry e) {
log.debug("sampling jdbc");
SampleResult res = new SampleResult();
res.setSampleLabel(getName());
res.setSamplerData(toString());
res.setDataType(SampleResult.TEXT);
// Bug 31184 - make sure encoding is specified
res.setDataEncoding(System.getProperty("file.encoding")); // $NON-NLS-1$
// Assume we will be successful
res.setSuccessful(true);
res.sampleStart();
DataSourceComponent pool = (DataSourceComponent) getThreadContext().getVariables().getObject(getDataSource());
log.debug("DataSourceComponent: " + pool);
Connection conn = null;
Statement stmt = null;
try {
if (pool == null)
throw new SQLException("No pool created");
// TODO: Consider creating a sub-result with the time to get the
// connection.
conn = pool.getConnection();
// Based on query return value, get results
String _queryType = getQueryType();
if (SELECT.equals(_queryType)) {
stmt = conn.createStatement();
ResultSet rs = null;
try {
rs = stmt.executeQuery(getQuery());
Data data = getDataFromResultSet(rs);
res.setResponseData(data.toString().getBytes());
} finally {
close(rs);
}
} else if (CALLABLE.equals(_queryType)) {
CallableStatement cstmt = getCallableStatement(conn);
setArguments(cstmt);
// A CallableStatement can return more than 1 ResultSets
// plus a number of update counts.
boolean hasResultSet = cstmt.execute();
String sb = resultSetsToString(cstmt,hasResultSet);
res.setResponseData(sb.toString().getBytes());
} else if (UPDATE.equals(_queryType)) {
stmt = conn.createStatement();
stmt.executeUpdate(getQuery());
int updateCount = stmt.getUpdateCount();
String results = updateCount + " updates";
res.setResponseData(results.getBytes());
} else if (PREPARED_SELECT.equals(_queryType)) {
PreparedStatement pstmt = getPreparedStatement(conn);
setArguments(pstmt);
pstmt.executeQuery();
String sb = resultSetsToString(pstmt,true);
res.setResponseData(sb.toString().getBytes());
} else if (PREPARED_UPDATE.equals(_queryType)) {
PreparedStatement pstmt = getPreparedStatement(conn);
setArguments(pstmt);
pstmt.executeUpdate();
String sb = resultSetsToString(pstmt,false);
res.setResponseData(sb.toString().getBytes());
} else if (ROLLBACK.equals(_queryType)){
conn.rollback();
res.setResponseData(ROLLBACK.getBytes());
} else if (COMMIT.equals(_queryType)){
conn.commit();
res.setResponseData(COMMIT.getBytes());
} else if (AUTOCOMMIT_FALSE.equals(_queryType)){
conn.setAutoCommit(false);
res.setResponseData(AUTOCOMMIT_FALSE.getBytes());
} else if (AUTOCOMMIT_TRUE.equals(_queryType)){
conn.setAutoCommit(true);
res.setResponseData(AUTOCOMMIT_TRUE.getBytes());
} else { // User provided incorrect query type
String results="Unexpected query type: "+_queryType;
res.setResponseMessage(results);
res.setSuccessful(false);
}
} catch (SQLException ex) {
log.error("Error in JDBC sampling", ex);
res.setResponseMessage(ex.toString());
res.setSuccessful(false);
} finally {
close(stmt);
close(conn);
}
res.sampleEnd();
return res;
}
private String resultSetsToString(PreparedStatement pstmt, boolean result) throws SQLException {
StringBuffer sb = new StringBuffer();
sb.append("\n"); // $NON-NLS-1$
int updateCount = 0;
if (!result) {
updateCount = pstmt.getUpdateCount();
}
do {
if (result) {
ResultSet rs = null;
try {
rs = pstmt.getResultSet();
Data data = getDataFromResultSet(rs);
sb.append(data.toString()).append("\n"); // $NON-NLS-1$
} finally {
close(rs);
}
} else {
sb.append(updateCount).append(" updates.\n");
}
result = pstmt.getMoreResults();
if (!result) {
updateCount = pstmt.getUpdateCount();
}
} while (result || (updateCount != -1));
return sb.toString();
}
private void setArguments(PreparedStatement pstmt) throws SQLException {
if (getQueryArguments().trim().length()==0) {
return;
}
String[] arguments = getQueryArguments().split(","); // $NON-NLS-1$
String[] argumentsTypes = getQueryArgumentsTypes().split(","); // $NON-NLS-1$
if (arguments.length != argumentsTypes.length) {
throw new SQLException("number of arguments ("+arguments.length+") and number of types ("+argumentsTypes.length+") are not equal");
}
for (int i = 0; i < arguments.length; i++) {
String argument = arguments[i];
String argumentType = argumentsTypes[i];
int targetSqlType = getJdbcType(argumentType);
pstmt.setObject(i+1, argument, targetSqlType);
}
}
private static int getJdbcType(String jdbcType) {
return ((Integer)mapJdbcNameToInt.get(jdbcType.toLowerCase())).intValue();
}
private CallableStatement getCallableStatement(Connection conn) throws SQLException {
return (CallableStatement) getPreparedStatement(conn,true);
}
private PreparedStatement getPreparedStatement(Connection conn) throws SQLException {
return getPreparedStatement(conn,false);
}
private PreparedStatement getPreparedStatement(Connection conn, boolean callable) throws SQLException {
Map preparedStatementMap = (Map) perConnCache.get(conn);
if (null == preparedStatementMap ) {
// MRU PreparedStatements cache.
preparedStatementMap = new LinkedHashMap(MAX_ENTRIES) {
protected boolean removeEldestEntry(java.util.Map.Entry arg0) {
final int theSize = size();
if (theSize > MAX_ENTRIES) {
Object value = arg0.getValue();
if (value instanceof PreparedStatement) {
PreparedStatement pstmt = (PreparedStatement) value;
close(pstmt);
}
return true;
}
return false;
}
};
perConnCache.put(conn, preparedStatementMap);
}
PreparedStatement pstmt = (PreparedStatement) preparedStatementMap.get(getQuery());
if (null == pstmt) {
if (callable) {
pstmt = conn.prepareCall(getQuery());
} else {
pstmt = conn.prepareStatement(getQuery());
}
preparedStatementMap.put(getQuery(), pstmt);
}
pstmt.clearParameters();
return pstmt;
}
private static void closeAllStatements(Collection collection) {
Iterator iterator = collection.iterator();
while (iterator.hasNext()) {
PreparedStatement pstmt = (PreparedStatement) iterator.next();
close(pstmt);
}
}
/**
* Gets a Data object from a ResultSet.
*
* @param rs
* ResultSet passed in from a database query
* @return a Data object
* @throws java.sql.SQLException
*/
private Data getDataFromResultSet(ResultSet rs) throws SQLException {
ResultSetMetaData meta = rs.getMetaData();
Data data = new Data();
int numColumns = meta.getColumnCount();
String[] dbCols = new String[numColumns];
for (int i = 0; i < numColumns; i++) {
dbCols[i] = meta.getColumnName(i + 1);
data.addHeader(dbCols[i]);
}
while (rs.next()) {
data.next();
for (int i = 0; i < numColumns; i++) {
Object o = rs.getObject(i + 1);
if (o instanceof byte[]) {
o = new String((byte[]) o);
}
data.addColumnValue(dbCols[i], o);
}
}
return data;
}
public static void close(Connection c) {
try {
if (c != null) c.close();
} catch (SQLException e) {
log.warn("Error closing Connection", e);
}
}
public static void close(Statement s) {
try {
if (s != null) s.close();
} catch (SQLException e) {
log.warn("Error closing Statement " + s.toString(), e);
}
}
public static void close(ResultSet rs) {
try {
if (rs != null) rs.close();
} catch (SQLException e) {
log.warn("Error closing ResultSet", e);
}
}
public String getQuery() {
return query;
}
public String toString() {
StringBuffer sb = new StringBuffer(80);
sb.append("["); // $NON-NLS-1$
sb.append(getQueryType());
sb.append("] "); // $NON-NLS-1$
sb.append(getQuery());
return sb.toString();
}
/**
* @param query
* The query to set.
*/
public void setQuery(String query) {
this.query = query;
}
/**
* @return Returns the dataSource.
*/
public String getDataSource() {
return dataSource;
}
/**
* @param dataSource
* The dataSource to set.
*/
public void setDataSource(String dataSource) {
this.dataSource = dataSource;
}
/**
* @return Returns the queryType.
*/
public String getQueryType() {
return queryType;
}
/**
* @param queryType The queryType to set.
*/
public void setQueryType(String queryType) {
this.queryType = queryType;
}
public String getQueryArguments() {
return queryArguments;
}
public void setQueryArguments(String queryArguments) {
this.queryArguments = queryArguments;
}
public String getQueryArgumentsTypes() {
return queryArgumentsTypes;
}
public void setQueryArgumentsTypes(String queryArgumentsType) {
this.queryArgumentsTypes = queryArgumentsType;
}
}