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herddb.jdbc.HerdDBConnection Maven / Gradle / Ivy
/*
* Licensed to Diennea S.r.l. under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Diennea S.r.l. 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 herddb.jdbc;
import static herddb.model.TransactionContext.AUTOTRANSACTION_ID;
import static herddb.model.TransactionContext.NOTRANSACTION_ID;
import herddb.client.ClientSideMetadataProviderException;
import herddb.client.HDBConnection;
import herddb.client.HDBException;
import herddb.jdbc.utils.SQLExceptionUtils;
import herddb.model.TransactionContext;
import herddb.utils.QueryUtils;
import java.sql.Array;
import java.sql.Blob;
import java.sql.CallableStatement;
import java.sql.Clob;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.NClob;
import java.sql.PreparedStatement;
import java.sql.SQLClientInfoException;
import java.sql.SQLException;
import java.sql.SQLFeatureNotSupportedException;
import java.sql.SQLWarning;
import java.sql.SQLXML;
import java.sql.Savepoint;
import java.sql.Statement;
import java.sql.Struct;
import java.util.Map;
import java.util.Objects;
import java.util.Properties;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.Executor;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* JDBC Connection
*
* @author enrico.olivelli
*/
public class HerdDBConnection implements java.sql.Connection {
private final HDBConnection connection;
private long transactionId;
private boolean autocommit = true;
private String tableSpace;
private final BasicHerdDBDataSource datasource;
private boolean closed;
private final ConcurrentHashMap openStatements = new ConcurrentHashMap<>();
private int transactionIsolation = Connection.TRANSACTION_READ_COMMITTED;
HerdDBConnection(BasicHerdDBDataSource datasource, HDBConnection connection, String defaultTablespace) throws SQLException {
if (connection == null) {
throw new NullPointerException();
}
this.connection = connection;
this.datasource = datasource;
reset(defaultTablespace);
}
final void reset(String defaultTablespace) {
if (!openStatements.isEmpty()) {
throw new IllegalStateException("Found open statements " + openStatements);
}
this.autocommit = true;
this.tableSpace = defaultTablespace;
this.transactionId = 0;
this.closed = false;
}
long ensureTransaction() throws SQLException {
if (!autocommit && transactionId == NOTRANSACTION_ID) {
// transaction will be started at first statement execution
transactionId = TransactionContext.AUTOTRANSACTION_ID;
}
return transactionId;
}
public String getTableSpace() {
return tableSpace;
}
public HDBConnection getConnection() {
return connection;
}
@Override
public Statement createStatement() throws SQLException {
return new HerdDBStatement(this);
}
@Override
public PreparedStatement prepareStatement(String sql) throws SQLException {
return new HerdDBPreparedStatement(this, sql, false);
}
private PreparedStatement prepareStatement(String sql, boolean returnValues) throws SQLException {
return new HerdDBPreparedStatement(this, sql, returnValues);
}
@Override
public CallableStatement prepareCall(String sql) throws SQLException {
throw new SQLFeatureNotSupportedException("Not supported yet.");
}
@Override
public String nativeSQL(String sql) throws SQLException {
return sql;
}
@Override
public void setAutoCommit(boolean autoCommit) throws SQLException {
if (this.autocommit == autoCommit) {
return;
}
if (this.autocommit && !autoCommit) {
this.autocommit = false;
return;
}
if (!this.autocommit && autoCommit) {
commit();
this.autocommit = true;
}
}
@Override
public boolean getAutoCommit() throws SQLException {
return autocommit;
}
@Override
public void commit() throws SQLException {
if (autocommit) {
throw new SQLException("connection is in autocommit mode");
}
if (transactionId == NOTRANSACTION_ID || transactionId == AUTOTRANSACTION_ID) {
// no transaction actually started, nothing to commit
return;
}
ensureAllStatementClosed();
try {
connection.commitTransaction(tableSpace, transactionId);
} catch (ClientSideMetadataProviderException | HDBException err) {
throw SQLExceptionUtils.wrapException(err);
} finally {
transactionId = NOTRANSACTION_ID;
}
}
@Override
public void rollback() throws SQLException {
if (autocommit) {
throw new SQLException("connection is not in autocommit mode");
}
if (transactionId == NOTRANSACTION_ID || transactionId == AUTOTRANSACTION_ID) {
// no transaction actually started, nothing to commit
return;
}
ensureAllStatementClosed();
try {
connection.rollbackTransaction(tableSpace, transactionId);
} catch (ClientSideMetadataProviderException | HDBException err) {
throw SQLExceptionUtils.wrapException(err);
} finally {
transactionId = NOTRANSACTION_ID;
}
}
private void ensureAllStatementClosed() throws SQLException {
for (HerdDBStatement ps : openStatements.values()) {
LOGGER.log(Level.FINE, "closing abandoned statement {0}", ps);
try {
ps.close();
} catch (SQLException err) {
LOGGER.log(Level.SEVERE, "Cannot close an open statement", err);
}
}
openStatements.clear();
}
@Override
public void close() throws SQLException {
if (closed) {
return;
}
ensureAllStatementClosed();
if (transactionId != NOTRANSACTION_ID
&& transactionId != AUTOTRANSACTION_ID) {
rollback();
}
closed = true;
datasource.releaseConnection(this);
}
@Override
public boolean isClosed() throws SQLException {
return closed || connection.isClosed();
}
@Override
public DatabaseMetaData getMetaData() throws SQLException {
return new HerdDBDatabaseMetadata(this, tableSpace, datasource.getUrl(), datasource.getUsername());
}
@Override
public void setReadOnly(boolean readOnly) throws SQLException {
}
@Override
public boolean isReadOnly() throws SQLException {
return false;
}
@Override
public void setCatalog(String catalog) throws SQLException {
}
@Override
public String getCatalog() throws SQLException {
return null;
}
@Override
public void setTransactionIsolation(int level) throws SQLException {
if (level != Connection.TRANSACTION_READ_COMMITTED
&& level != Connection.TRANSACTION_REPEATABLE_READ) {
LOGGER.log(Level.SEVERE,
"Warning, ignoring setTransactionIsolation {0}, only TRANSACTION_READ_COMMITTED and TRANSACTION_REPEATABLE_READ are supported", level);
}
transactionIsolation = level;
}
private static final Logger LOGGER = Logger.getLogger(HerdDBConnection.class.getName());
@Override
public int getTransactionIsolation() throws SQLException {
return transactionIsolation;
}
@Override
public SQLWarning getWarnings() throws SQLException {
return null;
}
@Override
public void clearWarnings() throws SQLException {
}
@Override
public Statement createStatement(int resultSetType, int resultSetConcurrency) throws SQLException {
return createStatement();
}
@Override
public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
return prepareStatement(sql);
}
@Override
public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public Map> getTypeMap() throws SQLException {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public void setTypeMap(Map> map) throws SQLException {
throw new SQLFeatureNotSupportedException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public void setHoldability(int holdability) throws SQLException {
throw new SQLFeatureNotSupportedException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public int getHoldability() throws SQLException {
throw new SQLFeatureNotSupportedException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public Savepoint setSavepoint() throws SQLException {
throw new SQLFeatureNotSupportedException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public Savepoint setSavepoint(String name) throws SQLException {
throw new SQLFeatureNotSupportedException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public void rollback(Savepoint savepoint) throws SQLException {
throw new SQLFeatureNotSupportedException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public void releaseSavepoint(Savepoint savepoint) throws SQLException {
throw new SQLFeatureNotSupportedException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public Statement createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
return createStatement();
}
@Override
public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency,
int resultSetHoldability) throws SQLException {
return prepareStatement(sql);
}
@Override
public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency,
int resultSetHoldability) throws SQLException {
throw new SQLFeatureNotSupportedException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys) throws SQLException {
return prepareStatement(sql, autoGeneratedKeys == Statement.RETURN_GENERATED_KEYS);
}
@Override
public PreparedStatement prepareStatement(String sql, int[] columnIndexes) throws SQLException {
return prepareStatement(sql, columnIndexes != null && columnIndexes.length > 0);
}
@Override
public PreparedStatement prepareStatement(String sql, String[] columnNames) throws SQLException {
return prepareStatement(sql, columnNames != null && columnNames.length > 0);
}
@Override
public Clob createClob() throws SQLException {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public Blob createBlob() throws SQLException {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public NClob createNClob() throws SQLException {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public SQLXML createSQLXML() throws SQLException {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public boolean isValid(int timeout) throws SQLException {
return true;
}
private Properties clientInfo = new Properties();
@Override
public void setClientInfo(String name, String value) throws SQLClientInfoException {
clientInfo.put(name, value);
}
@Override
public void setClientInfo(Properties properties) throws SQLClientInfoException {
clientInfo.putAll(properties);
}
@Override
public String getClientInfo(String name) throws SQLException {
return clientInfo.getProperty(name);
}
@Override
public Properties getClientInfo() throws SQLException {
return clientInfo;
}
@Override
public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public void setSchema(String schema) throws SQLException {
if (transactionId > 0 && !Objects.equals(schema, tableSpace)) {
throw new SQLException(
"cannot switch to schema " + schema + ", transaction (ID " + transactionId + ") is already started on tableSpace " + tableSpace);
}
this.tableSpace = schema;
}
@Override
public String getSchema() throws SQLException {
return tableSpace;
}
@Override
public void abort(Executor executor) throws SQLException {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public void setNetworkTimeout(Executor executor, int milliseconds) throws SQLException {
}
@Override
public int getNetworkTimeout() throws SQLException {
return 0;
}
@Override
public T unwrap(Class iface) throws SQLException {
return (T) this;
}
@Override
public boolean isWrapperFor(Class iface) throws SQLException {
return false;
}
@Override
public String toString() {
return "HerdDBConnection{connection=" + connection + ", transactionId=" + transactionId + ", autocommit=" + autocommit + ", tableSpace=" + tableSpace + '}';
}
void discoverTableSpace(String sql) throws SQLException {
setSchema(QueryUtils.discoverTablespace(tableSpace, sql));
}
void releaseStatement(HerdDBStatement statement) {
this.openStatements.remove(statement.getId());
}
void bindToTransaction(long transactionId) {
this.transactionId = transactionId;
}
void registerOpenStatement(HerdDBStatement statement) {
openStatements.put(statement.getId(), statement);
}
boolean isKeepReadLocks() {
return transactionIsolation == Connection.TRANSACTION_REPEATABLE_READ;
}
long getTransactionId() {
return transactionId;
}
}
