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ConnectionImpl.java
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ConnectionImpl.java
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/*
* Copyright <2019> Amazon.com, Inc. or its affiliates. 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.
* A copy of the License is located at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* or in the "license" file accompanying this file. This file 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.amazon.opendistroforelasticsearch.jdbc;
import com.amazon.opendistroforelasticsearch.jdbc.config.ConnectionConfig;
import com.amazon.opendistroforelasticsearch.jdbc.internal.JdbcWrapper;
import com.amazon.opendistroforelasticsearch.jdbc.internal.Version;
import com.amazon.opendistroforelasticsearch.jdbc.internal.util.JavaUtil;
import com.amazon.opendistroforelasticsearch.jdbc.logging.LoggingSource;
import com.amazon.opendistroforelasticsearch.jdbc.protocol.ProtocolFactory;
import com.amazon.opendistroforelasticsearch.jdbc.protocol.exceptions.ResponseException;
import com.amazon.opendistroforelasticsearch.jdbc.protocol.http.JsonHttpProtocolFactory;
import com.amazon.opendistroforelasticsearch.jdbc.transport.Transport;
import com.amazon.opendistroforelasticsearch.jdbc.transport.TransportException;
import com.amazon.opendistroforelasticsearch.jdbc.logging.Logger;
import com.amazon.opendistroforelasticsearch.jdbc.protocol.ClusterMetadata;
import com.amazon.opendistroforelasticsearch.jdbc.protocol.ConnectionResponse;
import com.amazon.opendistroforelasticsearch.jdbc.protocol.Protocol;
import com.amazon.opendistroforelasticsearch.jdbc.transport.http.ApacheHttpTransportFactory;
import com.amazon.opendistroforelasticsearch.jdbc.transport.TransportFactory;
import java.io.IOException;
import java.sql.Array;
import java.sql.Blob;
import java.sql.CallableStatement;
import java.sql.Clob;
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.SQLNonTransientException;
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.Properties;
import java.util.concurrent.Executor;
public class ConnectionImpl implements ElasticsearchConnection, JdbcWrapper, LoggingSource {
private String url;
private String user;
private Logger log;
private boolean open = false;
private Transport transport;
private Protocol protocol;
private ClusterMetadata clusterMetadata;
public ConnectionImpl(ConnectionConfig connectionConfig, Logger log) throws SQLException {
this(connectionConfig, ApacheHttpTransportFactory.INSTANCE, JsonHttpProtocolFactory.INSTANCE, log);
}
public ConnectionImpl(ConnectionConfig connectionConfig, TransportFactory transportFactory,
ProtocolFactory protocolFactory, Logger log) throws SQLException {
this.log = log;
this.url = connectionConfig.getUrl();
this.user = connectionConfig.getUser();
try {
this.transport = transportFactory.getTransport(connectionConfig, log, getUserAgent());
} catch (TransportException te) {
logAndThrowSQLException(
log, new SQLNonTransientException("Could not initialize transport for the connection: "+te.getMessage(), te)
);
}
this.protocol = protocolFactory.getProtocol(connectionConfig, this.transport);
log.debug(() -> logMessage("Initialized Transport: %s, Protocol: %s", transport, protocol));
try {
ConnectionResponse connectionResponse = this.protocol.connect(connectionConfig.getLoginTimeout() * 1000);
this.clusterMetadata = connectionResponse.getClusterMetadata();
this.open = true;
} catch (ResponseException | IOException ex) {
logAndThrowSQLException(log, new SQLException("Connection error "+ex.getMessage(), ex));
}
}
public String getUser() {
return user;
}
@Override
public Statement createStatement() throws SQLException {
log.debug(() -> logEntry("createStatement()"));
Statement st = createStatementX();
log.debug(() -> logExit("createStatement", st));
return st;
}
public Statement createStatementX() throws SQLException {
return new StatementImpl(this, log);
}
@Override
public PreparedStatement prepareStatement(String sql) throws SQLException {
log.debug(() -> logEntry("prepareStatment (%s)", sql));
checkOpen();
PreparedStatement pst = prepareStatementX(sql);
log.debug(() -> logExit("prepareStatement", pst));
return pst;
}
private PreparedStatement prepareStatementX(String sql) throws SQLException {
return new PreparedStatementImpl(this, sql, log);
}
@Override
public CallableStatement prepareCall(String sql) throws SQLException {
throw new SQLFeatureNotSupportedException("prepareCall is not supported.");
}
@Override
public String nativeSQL(String sql) throws SQLException {
checkOpen();
return sql;
}
@Override
public void setAutoCommit(boolean autoCommit) throws SQLException {
checkOpen();
if (!autoCommit) {
throw new SQLNonTransientException("autoCommit can not be disabled.");
}
}
@Override
public boolean getAutoCommit() throws SQLException {
checkOpen();
return true;
}
@Override
public void commit() throws SQLException {
checkOpen();
throw new SQLNonTransientException("autoCommit is enabled on the connection.");
}
@Override
public void rollback() throws SQLException {
checkOpen();
throw new SQLNonTransientException("autoCommit is enabled on the connection.");
}
@Override
public void close() throws SQLException {
log.debug(() -> logEntry("close ()"));
closeX();
}
private void closeX() throws SQLException {
open = false;
try {
transport.close();
} catch (TransportException te) {
log.error(() -> logMessage("Exception closing transport: "+te), te);
}
log.close();
}
@Override
public boolean isClosed() throws SQLException {
return isClosedX();
}
protected boolean isClosedX() throws SQLException {
return !open;
}
@Override
public DatabaseMetaData getMetaData() throws SQLException {
log.debug(() -> logEntry("getMetaData()"));
DatabaseMetaData dbmd = new DatabaseMetaDataImpl(this, log);
log.debug(() -> logExit("getMetaData", dbmd));
return dbmd;
}
@Override
public void setReadOnly(boolean readOnly) throws SQLException {
if (!readOnly)
throw new SQLNonTransientException("read-only mode can not be disabled.");
}
@Override
public boolean isReadOnly() throws SQLException {
checkOpen();
return true;
}
@Override
public void setCatalog(String catalog) throws SQLException {
checkOpen();
// no-op
}
@Override
public String getCatalog() throws SQLException {
return getClusterName();
}
@Override
public void setTransactionIsolation(int level) throws SQLException {
checkOpen();
if (level != TRANSACTION_NONE)
throw new SQLNonTransientException("Only TRANSACTION_NONE is supported.");
}
@Override
public int getTransactionIsolation() throws SQLException {
checkOpen();
return TRANSACTION_NONE;
}
@Override
public SQLWarning getWarnings() throws SQLException {
checkOpen();
return null;
}
@Override
public void clearWarnings() throws SQLException {
checkOpen();
}
@Override
public Statement createStatement(int resultSetType, int resultSetConcurrency) throws SQLException {
log.debug(() -> logEntry("createStatement (%d, %d)", resultSetType, resultSetConcurrency));
checkOpen();
validateResultSetCharacteristics(resultSetType, resultSetConcurrency, ResultSet.HOLD_CURSORS_OVER_COMMIT);
Statement st = createStatementX();
log.debug(() -> logExit("createStatement", st));
return st;
}
private void validateResultSetCharacteristics(
int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
validateResultSetType(resultSetType);
validateResulSetConcurrency(resultSetConcurrency);
validateResultSetHoldability(resultSetHoldability);
}
private void validateResultSetType(int resultSetType) throws SQLException {
if (resultSetType != ResultSet.TYPE_FORWARD_ONLY)
throw new SQLNonTransientException("Only ResultSets of TYPE_FORWARD_ONLY are supported.");
}
private void validateResulSetConcurrency(int resultSetConcurrency) throws SQLException {
if (resultSetConcurrency != ResultSet.CONCUR_READ_ONLY)
throw new SQLNonTransientException("Only ResultSets with concurrency CONCUR_READ_ONLY are supported.");
}
private void validateResultSetHoldability(int holdability) throws SQLException {
if (holdability != ResultSet.HOLD_CURSORS_OVER_COMMIT)
throw new SQLNonTransientException("Only HOLD_CURSORS_OVER_COMMIT holdability is supported.");
}
@Override
public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
log.debug(() -> logEntry("prepareStatement (%s, %d, %d)", sql, resultSetType, resultSetConcurrency));
checkOpen();
validateResultSetCharacteristics(resultSetType, resultSetConcurrency, resultSetConcurrency);
PreparedStatement pst = prepareStatementX(sql);
log.debug(() -> logExit("prepareStatement", pst));
return pst;
}
@Override
public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
throw new SQLFeatureNotSupportedException("prepareCall is not supported");
}
@Override
public Map<String, Class<?>> getTypeMap() throws SQLException {
return null;
}
@Override
public void setTypeMap(Map<String, Class<?>> map) throws SQLException {
throw new SQLFeatureNotSupportedException("setTypeMap is not supported");
}
@Override
public void setHoldability(int holdability) throws SQLException {
checkOpen();
validateResultSetHoldability(holdability);
}
@Override
public int getHoldability() throws SQLException {
checkOpen();
return ResultSet.HOLD_CURSORS_OVER_COMMIT;
}
@Override
public Savepoint setSavepoint() throws SQLException {
throw new SQLFeatureNotSupportedException("Transactions and savepoints are not supported.");
}
@Override
public Savepoint setSavepoint(String name) throws SQLException {
throw new SQLFeatureNotSupportedException("Transactions and savepoints are not supported.");
}
@Override
public void rollback(Savepoint savepoint) throws SQLException {
throw new SQLFeatureNotSupportedException("Transactions are not supported.");
}
@Override
public void releaseSavepoint(Savepoint savepoint) throws SQLException {
throw new SQLFeatureNotSupportedException("Transactions and savepoints are not supported.");
}
@Override
public Statement createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability)
throws SQLException {
log.debug(() -> logEntry("createStatement (%d, %d, %d)", resultSetType, resultSetConcurrency, resultSetHoldability));
checkOpen();
validateResultSetCharacteristics(resultSetType, resultSetConcurrency, resultSetHoldability);
Statement st = createStatementX();
log.debug(() -> logExit("createStatment", st));
return st;
}
@Override
public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
log.debug(() -> logEntry("prepareStatement (%s, %d, %d, %d)", sql, resultSetType, resultSetConcurrency, resultSetHoldability));
checkOpen();
validateResultSetCharacteristics(resultSetType, resultSetConcurrency, resultSetHoldability);
PreparedStatement pst = prepareStatementX(sql);
log.debug(() -> logExit("prepareStatement", pst));
return pst;
}
@Override
public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
throw new SQLFeatureNotSupportedException("prepareCall is not supported");
}
@Override
public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys) throws SQLException {
log.debug(() -> logEntry("prepareStatement (%s, %d)", sql, autoGeneratedKeys));
checkOpen();
if (autoGeneratedKeys != Statement.NO_GENERATED_KEYS) {
throw new SQLFeatureNotSupportedException("Auto generated keys are not supported.");
}
PreparedStatement pst = prepareStatementX(sql);
log.debug(() -> logExit("prepareStatement", pst));
return pst;
}
@Override
public PreparedStatement prepareStatement(String sql, int[] columnIndexes) throws SQLException {
throw new SQLFeatureNotSupportedException("Auto generated keys are not supported.");
}
@Override
public PreparedStatement prepareStatement(String sql, String[] columnNames) throws SQLException {
throw new SQLFeatureNotSupportedException("Auto generated keys are not supported.");
}
@Override
public Clob createClob() throws SQLException {
throw new SQLFeatureNotSupportedException("Clob is not supported.");
}
@Override
public Blob createBlob() throws SQLException {
throw new SQLFeatureNotSupportedException("Blob is not supported.");
}
@Override
public NClob createNClob() throws SQLException {
throw new SQLFeatureNotSupportedException("NClob is not supported.");
}
@Override
public SQLXML createSQLXML() throws SQLException {
throw new SQLFeatureNotSupportedException("SQLXML is not supported.");
}
@Override
public boolean isValid(int timeout) throws SQLException {
// TODO - implement through a HEAD or a GET to "/", or a dummy SQL?
log.debug(() -> logEntry("isValid (%d)", timeout));
boolean isValid = true;
log.debug(() -> logExit("isValid", isValid));
return isValid;
}
@Override
public void setClientInfo(String name, String value) throws SQLClientInfoException {
throw new SQLClientInfoException("Client info is not supported.", null);
}
@Override
public void setClientInfo(Properties properties) throws SQLClientInfoException {
throw new SQLClientInfoException("Client info is not supported.", null);
}
@Override
public String getClientInfo(String name) throws SQLException {
checkOpen();
return null;
}
@Override
public Properties getClientInfo() throws SQLException {
checkOpen();
return null;
}
@Override
public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
throw new SQLFeatureNotSupportedException("Array is not supported.");
}
@Override
public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
throw new SQLFeatureNotSupportedException("Struct is not supported.");
}
@Override
public void setSchema(String schema) throws SQLException {
// no-op
}
@Override
public String getSchema() throws SQLException {
return "";
}
@Override
public void abort(Executor executor) throws SQLException {
log.debug(() -> logEntry("abort (%s) ", executor));
closeX();
log.debug(() -> logExit("abort"));
}
@Override
public void setNetworkTimeout(Executor executor, int milliseconds) throws SQLException {
checkOpen();
// no-op, not supported yet
}
@Override
public int getNetworkTimeout() throws SQLException {
return 0;
}
public String getUrl() {
return url;
}
private void checkOpen() throws SQLException {
if (isClosedX()) {
logAndThrowSQLException(log, new SQLException("Connection is closed."));
}
}
@Override
public String getClusterName() throws SQLException {
checkOpen();
return clusterMetadata.getClusterName();
}
@Override
public String getClusterUUID() throws SQLException {
checkOpen();
return clusterMetadata.getClusterUUID();
}
public ClusterMetadata getClusterMetadata() throws SQLException {
checkOpen();
return this.clusterMetadata;
}
public Transport getTransport() {
return transport;
}
public Protocol getProtocol() {
return protocol;
}
public Logger getLog() {
return log;
}
private String getUserAgent() {
return String.format("openes-jdbc/%s (Java %s)",
Version.Current.getFullVersion(), JavaUtil.getJavaVersion());
}
}