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MySqlBulkDatabaseWriter.java
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MySqlBulkDatabaseWriter.java
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/**
* Licensed to JumpMind Inc under one or more contributor
* license agreements. See the NOTICE file distributed
* with this work for additional information regarding
* copyright ownership. JumpMind Inc licenses this file
* to you under the GNU General Public License, version 3.0 (GPLv3)
* (the "License"); you may not use this file except in compliance
* with the License.
*
* You should have received a copy of the GNU General Public License,
* version 3.0 (GPLv3) along with this library; if not, see
* <http://www.gnu.org/licenses/>.
*
* 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.jumpmind.symmetric.io;
import java.io.ByteArrayOutputStream;
import java.io.OutputStreamWriter;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Types;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.Map;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.codec.binary.Hex;
import org.apache.commons.lang.ArrayUtils;
import org.jumpmind.db.model.Column;
import org.jumpmind.db.model.Table;
import org.jumpmind.db.platform.DatabaseInfo;
import org.jumpmind.db.platform.IDatabasePlatform;
import org.jumpmind.db.sql.JdbcSqlTransaction;
import org.jumpmind.db.util.BinaryEncoding;
import org.jumpmind.symmetric.csv.CsvWriter;
import org.jumpmind.symmetric.io.data.CsvData;
import org.jumpmind.symmetric.io.data.CsvUtils;
import org.jumpmind.symmetric.io.data.DataEventType;
import org.jumpmind.symmetric.io.data.writer.DataWriterStatisticConstants;
import org.jumpmind.symmetric.io.stage.IStagedResource;
import org.jumpmind.symmetric.io.stage.IStagingManager;
import org.springframework.jdbc.support.nativejdbc.NativeJdbcExtractor;
public class MySqlBulkDatabaseWriter extends AbstractBulkDatabaseWriter {
protected NativeJdbcExtractor jdbcExtractor;
protected int maxRowsBeforeFlush;
protected long maxBytesBeforeFlush;
protected boolean isLocal;
protected boolean isReplace;
protected IStagingManager stagingManager;
protected IStagedResource stagedInputFile;
protected int loadedRows = 0;
protected long loadedBytes = 0;
protected boolean needsBinaryConversion;
protected Table table = null;
public MySqlBulkDatabaseWriter(IDatabasePlatform symmetricPlatform,
IDatabasePlatform targetPlatform, String tablePrefix,
IStagingManager stagingManager, NativeJdbcExtractor jdbcExtractor,
int maxRowsBeforeFlush, long maxBytesBeforeFlush, boolean isLocal, boolean isReplace) {
super(symmetricPlatform, targetPlatform, tablePrefix);
this.jdbcExtractor = jdbcExtractor;
this.maxRowsBeforeFlush = maxRowsBeforeFlush;
this.maxBytesBeforeFlush = maxBytesBeforeFlush;
this.isLocal = isLocal;
this.isReplace = isReplace;
this.stagingManager = stagingManager;
this.writerSettings.setCreateTableFailOnError(false);
}
public boolean start(Table table) {
this.table = table;
if (super.start(table) && targetTable != null) {
needsBinaryConversion = false;
if (! batch.getBinaryEncoding().equals(BinaryEncoding.NONE)) {
for (Column column : targetTable.getColumns()) {
if (column.isOfBinaryType()) {
needsBinaryConversion = true;
break;
}
}
}
//TODO: Did this because start is getting called multiple times
// for the same table in a single batch before end is being called
if (this.stagedInputFile == null) {
createStagingFile();
}
return true;
} else {
return false;
}
}
@Override
public void end(Table table) {
try {
flush();
this.stagedInputFile.close();
this.stagedInputFile.delete();
} finally {
super.end(table);
}
}
protected void bulkWrite(CsvData data) {
DataEventType dataEventType = data.getDataEventType();
switch (dataEventType) {
case INSERT:
statistics.get(batch).startTimer(DataWriterStatisticConstants.LOADMILLIS);
try {
String[] parsedData = data.getParsedData(CsvData.ROW_DATA);
byte[] byteData = null;
if (needsBinaryConversion) {
ByteArrayOutputStream out = new ByteArrayOutputStream();
CsvWriter writer = new CsvWriter(new OutputStreamWriter(out), ',');
writer.setEscapeMode(CsvWriter.ESCAPE_MODE_BACKSLASH);
writer.setRecordDelimiter('\n');
writer.setTextQualifier('"');
writer.setUseTextQualifier(true);
writer.setForceQualifier(true);
writer.setNullString("\\N");
Column[] columns = targetTable.getColumns();
for (int i = 0; i < columns.length; i++) {
if (columns[i].isOfBinaryType() && parsedData[i] != null) {
if (i > 0) {
out.write(',');
}
out.write('"');
if (batch.getBinaryEncoding().equals(BinaryEncoding.HEX)) {
out.write(escape(Hex.decodeHex(parsedData[i].toCharArray())));
} else if (batch.getBinaryEncoding().equals(BinaryEncoding.BASE64)) {
out.write(new String(Hex.encodeHex(Base64.decodeBase64(parsedData[i].getBytes()))).getBytes());
}
out.write('"');
} else {
writer.write(parsedData[i], true);
writer.flush();
}
}
writer.endRecord();
writer.close();
byteData = out.toByteArray();
} else {
String formattedData = CsvUtils.escapeCsvData(parsedData, '\n', '"', CsvWriter.ESCAPE_MODE_BACKSLASH, "\\N");
byteData = formattedData.getBytes();
}
this.stagedInputFile.getOutputStream().write(byteData);
loadedRows++;
loadedBytes += byteData.length;
} catch (Exception ex) {
throw getPlatform().getSqlTemplate().translate(ex);
} finally {
statistics.get(batch).stopTimer(DataWriterStatisticConstants.LOADMILLIS);
statistics.get(batch).increment(DataWriterStatisticConstants.ROWCOUNT);
statistics.get(batch).increment(DataWriterStatisticConstants.LINENUMBER);
statistics.get(batch).stopTimer(DataWriterStatisticConstants.LOADMILLIS);
}
break;
case UPDATE:
case DELETE:
default:
flush();
writeDefault(data);
break;
}
if (loadedRows >= maxRowsBeforeFlush || loadedBytes >= maxBytesBeforeFlush) {
flush();
}
}
protected void flush() {
if (loadedRows > 0) {
this.stagedInputFile.close();
statistics.get(batch).startTimer(DataWriterStatisticConstants.LOADMILLIS);
try {
DatabaseInfo dbInfo = getPlatform().getDatabaseInfo();
String quote = dbInfo.getDelimiterToken();
String catalogSeparator = dbInfo.getCatalogSeparator();
String schemaSeparator = dbInfo.getSchemaSeparator();
JdbcSqlTransaction jdbcTransaction = (JdbcSqlTransaction) getTargetTransaction();
Connection c = jdbcTransaction.getConnection();
String sql = String.format("LOAD DATA " + (isLocal ? "LOCAL " : "") +
"INFILE '" + stagedInputFile.getFile().getAbsolutePath()).replace('\\', '/') + "' " +
(isReplace ? "REPLACE " : "IGNORE ") + "INTO TABLE " +
this.getTargetTable().getQualifiedTableName(quote, catalogSeparator, schemaSeparator) +
" FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '\"' ESCAPED BY '\\\\' LINES TERMINATED BY '\\n' STARTING BY '' " +
getCommaDeliminatedColumns(table.getColumns());
Statement stmt = c.createStatement();
//TODO: clean this up, deal with errors, etc.?
log.debug(sql);
stmt.execute(sql);
stmt.close();
getTargetTransaction().commit();
} catch (SQLException ex) {
throw getPlatform().getSqlTemplate().translate(ex);
} finally {
statistics.get(batch).stopTimer(DataWriterStatisticConstants.LOADMILLIS);
this.stagedInputFile.delete();
createStagingFile();
loadedRows = 0;
loadedBytes = 0;
}
}
}
protected String getCommaDeliminatedColumns(Column[] cols) {
DatabaseInfo dbInfo = getPlatform().getDatabaseInfo();
String quote = dbInfo.getDelimiterToken();
StringBuilder columns = new StringBuilder();
columns.append("(");
// The target syntax is (where BLOB is involved):
// ('column1', 'column2', @hexColumn3) SET 'column3'=UNHEX(@hexColumn3);
Map<String, String> blobColumns = new LinkedHashMap<String, String>();
Map<String, String> bitColumns = new LinkedHashMap<String, String>();
if (cols != null && cols.length > 0) {
for (Column column : cols) {
boolean blob = column.isOfBinaryType();
if (blob) {
String hexVariable = String.format("@%s_hex", column.getName());
blobColumns.put(column.getName(), hexVariable);
columns.append(hexVariable);
} else if (column.getMappedTypeCode() == Types.BIT) {
String bitVar = "@" + column.getName();
columns.append(bitVar);
bitColumns.put(column.getName(), bitVar);
} else {
columns.append(quote);
columns.append(column.getName());
columns.append(quote);
}
columns.append(",");
}
columns.replace(columns.length() - 1, columns.length(), "");
columns.append(")");
// Build this (optional) clause:
// SET 'column3'=UNHEX(@hexColumn3);
StringBuilder setClause = new StringBuilder();
for (String columnName : blobColumns.keySet()) {
if (setClause.length() == 0) {
setClause.append(" SET ");
}
setClause.append(quote);
setClause.append(columnName);
setClause.append(quote);
setClause.append("=UNHEX(");
setClause.append(blobColumns.get(columnName));
setClause.append("),");
}
for (String columnName : bitColumns.keySet()) {
if (setClause.length() == 0) {
setClause.append(" SET ");
}
setClause.append(quote);
setClause.append(columnName);
setClause.append(quote);
setClause.append("=CAST(");
setClause.append(bitColumns.get(columnName));
setClause.append(" AS UNSIGNED),");
}
if (setClause.length() > 0) {
setClause.setLength(setClause.length()-1);
columns.append(setClause);
}
return columns.toString();
} else {
return " ";
}
}
protected byte[] escape(byte[] byteData) {
ArrayList<Integer> indexes = new ArrayList<Integer>();
for (int i = 0; i < byteData.length; i++) {
if (byteData[i] == '"' || byteData[i] == '\\') {
indexes.add(i + indexes.size());
}
}
for (Integer index : indexes) {
byteData = ArrayUtils.add(byteData, index, (byte) '\\');
}
return byteData;
}
protected void createStagingFile() {
//TODO: We should use constants for dir structure path,
// but we don't want to depend on symmetric core.
this.stagedInputFile = stagingManager.create("bulkloaddir",
table.getName() + this.getBatch().getBatchId() + ".csv");
}
}