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com.hazelcast.jdbc.JdbcConnection Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2020, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.jdbc;
import com.hazelcast.core.HazelcastInstance;
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.ResultSet;
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.Collections;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.Executor;
import java.util.concurrent.atomic.AtomicBoolean;
public class JdbcConnection implements Connection {
private final HazelcastSqlClient client;
/**
* Is connection closed.
*/
private final AtomicBoolean closed = new AtomicBoolean();
/**
* DB Schema
*/
private String schema;
/**
* Read-only flag. JDBC driver doesn't use it except for the getter/setter.
*/
private boolean readOnly = true;
/**
* Auto-commit flag
*/
private boolean autoCommit;
/**
* SQL warning chain
*/
private SQLWarning warnings;
JdbcConnection(HazelcastSqlClient client) {
this.client = client;
}
@Override
public Statement createStatement() throws SQLException {
checkClosed();
return new JdbcStatement(client, this);
}
@Override
public PreparedStatement prepareStatement(String sql) throws SQLException {
checkClosed();
return new JdbcPreparedStatement(sql, client, this);
}
@Override
public CallableStatement prepareCall(String sql) throws SQLException {
throw JdbcUtils.unsupported("CallableStatement not supported");
}
@Override
public String nativeSQL(String sql) throws SQLException {
checkClosed();
return sql;
}
@Override
public void setAutoCommit(boolean autoCommit) throws SQLException {
checkClosed();
this.autoCommit = autoCommit;
}
@Override
public boolean getAutoCommit() throws SQLException {
checkClosed();
return autoCommit;
}
@Override
public void commit() throws SQLException {
checkClosed();
if (autoCommit) {
throw new SQLException("Auto-commit is set to true");
}
}
@Override
public void rollback() throws SQLException {
checkClosed();
if (autoCommit) {
throw new SQLException("Auto-commit is set to true");
}
}
@Override
public void close() {
if (closed.compareAndSet(false, true)) {
client.shutdown();
}
}
@Override
public boolean isClosed() {
return closed.get();
}
@Override
public DatabaseMetaData getMetaData() {
return new JdbcDataBaseMetadata(this);
}
@Override
public void setReadOnly(boolean readOnly) throws SQLException {
checkClosed();
this.readOnly = readOnly;
}
@Override
public boolean isReadOnly() throws SQLException {
checkClosed();
return readOnly;
}
@Override
public void setCatalog(String catalog) throws SQLException {
checkClosed();
}
@Override
public String getCatalog() throws SQLException {
checkClosed();
return null;
}
@Override
public void setTransactionIsolation(int level) throws SQLException {
checkClosed();
switch (level) {
case Connection.TRANSACTION_NONE:
case Connection.TRANSACTION_READ_COMMITTED:
case Connection.TRANSACTION_READ_UNCOMMITTED:
case Connection.TRANSACTION_REPEATABLE_READ:
case Connection.TRANSACTION_SERIALIZABLE:
return;
default:
throw new SQLException("Invalid value for transaction isolation: " + level);
}
}
@Override
public int getTransactionIsolation() throws SQLException {
checkClosed();
return TRANSACTION_NONE;
}
@Override
public SQLWarning getWarnings() throws SQLException {
checkClosed();
return warnings;
}
@Override
public void clearWarnings() throws SQLException {
checkClosed();
warnings = null;
}
@Override
public Statement createStatement(int resultSetType, int resultSetConcurrency) throws SQLException {
checkClosed();
checkStatementParameters(resultSetType, resultSetConcurrency, ResultSet.CLOSE_CURSORS_AT_COMMIT);
return createStatement();
}
@Override
public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
checkClosed();
checkStatementParameters(resultSetType, resultSetConcurrency, ResultSet.CLOSE_CURSORS_AT_COMMIT);
return prepareStatement(sql);
}
@Override
public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
throw JdbcUtils.unsupported("CallableStatement not supported");
}
@Override
public Map> getTypeMap() throws SQLException {
throw JdbcUtils.unsupported("Type Map not supported");
}
@Override
public void setTypeMap(Map> map) throws SQLException {
throw JdbcUtils.unsupported("Type Map not supported");
}
@Override
public void setHoldability(int holdability) throws SQLException {
checkClosed();
if (!supportsHoldability(holdability)) {
throw JdbcUtils.unsupported("Value for holdability not supported " + holdability);
}
}
@Override
public int getHoldability() throws SQLException {
checkClosed();
return ResultSet.CLOSE_CURSORS_AT_COMMIT;
}
@Override
public Savepoint setSavepoint() throws SQLException {
throw JdbcUtils.unsupported("Savepoint is not supported.");
}
@Override
public Savepoint setSavepoint(String name) throws SQLException {
throw JdbcUtils.unsupported("Savepoint is not supported.");
}
@Override
public void rollback(Savepoint savepoint) throws SQLException {
throw JdbcUtils.unsupported("Rollback is not supported.");
}
@Override
public void releaseSavepoint(Savepoint savepoint) throws SQLException {
throw JdbcUtils.unsupported("Savepoint is not supported.");
}
@Override
public Statement createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability)
throws SQLException {
checkClosed();
checkStatementParameters(resultSetType, resultSetConcurrency, resultSetHoldability);
return createStatement();
}
@Override
public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability)
throws SQLException {
checkClosed();
checkStatementParameters(resultSetType, resultSetConcurrency, resultSetHoldability);
return prepareStatement(sql);
}
@Override
public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability)
throws SQLException {
throw JdbcUtils.unsupported("CallableStatement not supported");
}
@Override
public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys) throws SQLException {
checkClosed();
if (autoGeneratedKeys != Statement.NO_GENERATED_KEYS) {
throw unsupportedAutoGeneratedKeys();
}
return prepareStatement(sql);
}
@Override
public PreparedStatement prepareStatement(String sql, int[] columnIndexes) throws SQLException {
checkClosed();
if (columnIndexes.length != 0) {
throw unsupportedAutoGeneratedKeys();
}
return prepareStatement(sql);
}
@Override
public PreparedStatement prepareStatement(String sql, String[] columnNames) throws SQLException {
checkClosed();
if (columnNames.length != 0) {
throw unsupportedAutoGeneratedKeys();
}
return prepareStatement(sql);
}
@Override
public Clob createClob() throws SQLException {
throw JdbcUtils.unsupported("Clob is not supported.");
}
@Override
public Blob createBlob() throws SQLException {
throw JdbcUtils.unsupported("Blob is not supported");
}
@Override
public NClob createNClob() throws SQLException {
throw JdbcUtils.unsupported("NClob is not supported.");
}
@Override
public SQLXML createSQLXML() throws SQLException {
throw JdbcUtils.unsupported("SQLXML is not supported");
}
@Override
public boolean isValid(int timeout) throws SQLException {
if (timeout < 0) {
throw new SQLException("Timeout cannot be less than 0");
}
return !isClosed();
}
@Override
public void setClientInfo(String name, String value) throws SQLClientInfoException {
if (isClosed()) {
throw new SQLClientInfoException("Connection is closed", Collections.emptyMap());
}
generateWarning("Client info is not supported.");
}
@Override
public void setClientInfo(Properties properties) throws SQLClientInfoException {
if (isClosed()) {
throw new SQLClientInfoException("Connection is closed", Collections.emptyMap());
}
generateWarning("Client info is not supported.");
}
@Override
public String getClientInfo(String name) {
return null;
}
@Override
public Properties getClientInfo() {
return new Properties();
}
@Override
public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
throw JdbcUtils.unsupported("Array is not supported.");
}
@Override
public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
throw JdbcUtils.unsupported("Struct is not supported.");
}
@Override
public void setSchema(String schema) throws SQLException {
checkClosed();
this.schema = schema;
}
@Override
public String getSchema() throws SQLException {
checkClosed();
return schema;
}
@Override
public void abort(Executor executor) throws SQLException {
if (executor == null) {
throw new SQLException("Executor cannot be null");
}
close();
}
@Override
public void setNetworkTimeout(Executor executor, int milliseconds) throws SQLException {
throw JdbcUtils.unsupported("Network timeout is not supported");
}
@Override
public int getNetworkTimeout() throws SQLException {
throw JdbcUtils.unsupported("Network timeout is not supported");
}
@Override
public T unwrap(Class iface) {
return JdbcUtils.unwrap(this, iface);
}
@Override
public boolean isWrapperFor(Class iface) {
return JdbcUtils.isWrapperFor(this, iface);
}
public boolean supportsResultSetType(int resultSetType) {
return resultSetType == ResultSet.TYPE_FORWARD_ONLY;
}
public boolean supportsResultSetConcurrency(int resultSetConcurrency) {
return resultSetConcurrency == ResultSet.CONCUR_READ_ONLY;
}
public boolean supportsHoldability(int holdability) {
return holdability == ResultSet.CLOSE_CURSORS_AT_COMMIT;
}
JdbcUrl getJdbcUrl() {
return client.getJdbcUrl();
}
HazelcastInstance getClientInstance() {
return client.getClient();
}
private void generateWarning(String reason) {
SQLWarning currentWarning = new SQLWarning(reason);
if (warnings != null) {
warnings.setNextWarning(currentWarning);
} else {
warnings = currentWarning;
}
}
private void checkClosed() throws SQLException {
if (isClosed()) {
throw new SQLException("Connection is closed");
}
}
private void checkStatementParameters(int resultSetType, int resultSetConcurrency, int resultSetHoldability)
throws SQLException {
if (!supportsResultSetType(resultSetType)) {
throw JdbcUtils.unsupported("Unsupported ResultSet type: " + resultSetType);
}
if (!supportsResultSetConcurrency(resultSetConcurrency)) {
throw JdbcUtils.unsupported("Unsupported ResultSet concurrency: " + resultSetConcurrency);
}
if (!supportsHoldability(resultSetHoldability)) {
throw JdbcUtils.unsupported("Unsupported ResultSet holdability: " + resultSetHoldability);
}
}
private SQLFeatureNotSupportedException unsupportedAutoGeneratedKeys() {
return JdbcUtils.unsupported("Auto-generated keys are not supported.");
}
}
