/
AbstractJdbcConnection.java
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/
AbstractJdbcConnection.java
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/*
* Copyright 2019 Google LLC
*
* 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.google.cloud.spanner.jdbc;
import com.google.cloud.spanner.connection.ConnectionOptions;
import com.google.common.annotations.VisibleForTesting;
import com.google.rpc.Code;
import java.sql.CallableStatement;
import java.sql.ResultSet;
import java.sql.SQLClientInfoException;
import java.sql.SQLException;
import java.sql.SQLWarning;
import java.sql.SQLXML;
import java.sql.Savepoint;
import java.sql.Struct;
import java.util.Properties;
import java.util.concurrent.Executor;
/** Base class for Cloud Spanner JDBC connections. */
abstract class AbstractJdbcConnection extends AbstractJdbcWrapper
implements CloudSpannerJdbcConnection {
private static final String CALLABLE_STATEMENTS_UNSUPPORTED =
"Callable statements are not supported";
private static final String ONLY_SERIALIZABLE =
"Only isolation level TRANSACTION_SERIALIZABLE is supported";
private static final String ONLY_CLOSE_ALLOWED =
"Only holdability CLOSE_CURSORS_AT_COMMIT is supported";
private static final String SAVEPOINTS_UNSUPPORTED = "Savepoints are not supported";
private static final String SQLXML_UNSUPPORTED = "SQLXML is not supported";
private static final String STRUCTS_UNSUPPORTED = "Structs are not supported";
private static final String ABORT_UNSUPPORTED = "Abort is not supported";
private static final String NETWORK_TIMEOUT_UNSUPPORTED = "Network timeout is not supported";
static final String CLIENT_INFO_NOT_SUPPORTED =
"Cloud Spanner does not support ClientInfo property %s";
private final String connectionUrl;
private final ConnectionOptions options;
private final com.google.cloud.spanner.connection.Connection spanner;
private final Properties clientInfo;
private SQLWarning firstWarning = null;
private SQLWarning lastWarning = null;
AbstractJdbcConnection(String connectionUrl, ConnectionOptions options) throws SQLException {
this.connectionUrl = connectionUrl;
this.options = options;
this.spanner = options.getConnection();
this.clientInfo = new Properties(JdbcDatabaseMetaData.getDefaultClientInfoProperties());
}
/** Return the corresponding {@link com.google.cloud.spanner.connection.Connection} */
com.google.cloud.spanner.connection.Connection getSpannerConnection() {
return spanner;
}
@Override
public String getConnectionUrl() {
return connectionUrl;
}
ConnectionOptions getConnectionOptions() {
return options;
}
@Override
public CallableStatement prepareCall(String sql) throws SQLException {
return checkClosedAndThrowUnsupported(CALLABLE_STATEMENTS_UNSUPPORTED);
}
@Override
public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency)
throws SQLException {
return checkClosedAndThrowUnsupported(CALLABLE_STATEMENTS_UNSUPPORTED);
}
@Override
public CallableStatement prepareCall(
String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability)
throws SQLException {
return checkClosedAndThrowUnsupported(CALLABLE_STATEMENTS_UNSUPPORTED);
}
@Override
public void setTransactionIsolation(int level) throws SQLException {
checkClosed();
JdbcPreconditions.checkArgument(
level == TRANSACTION_SERIALIZABLE
|| level == TRANSACTION_REPEATABLE_READ
|| level == TRANSACTION_READ_UNCOMMITTED
|| level == TRANSACTION_READ_COMMITTED,
"Not a transaction isolation level");
JdbcPreconditions.checkSqlFeatureSupported(
level == TRANSACTION_SERIALIZABLE, ONLY_SERIALIZABLE);
}
@Override
public int getTransactionIsolation() throws SQLException {
checkClosed();
return TRANSACTION_SERIALIZABLE;
}
@Override
public void setHoldability(int holdability) throws SQLException {
checkClosed();
JdbcPreconditions.checkArgument(
holdability == ResultSet.HOLD_CURSORS_OVER_COMMIT
|| holdability == ResultSet.CLOSE_CURSORS_AT_COMMIT,
"Not a holdability value");
JdbcPreconditions.checkSqlFeatureSupported(
holdability == ResultSet.CLOSE_CURSORS_AT_COMMIT, ONLY_CLOSE_ALLOWED);
}
@Override
public int getHoldability() throws SQLException {
checkClosed();
return ResultSet.CLOSE_CURSORS_AT_COMMIT;
}
@Override
public SQLWarning getWarnings() throws SQLException {
checkClosed();
return firstWarning;
}
@Override
public void clearWarnings() throws SQLException {
checkClosed();
firstWarning = null;
lastWarning = null;
}
@Override
public Savepoint setSavepoint() throws SQLException {
return checkClosedAndThrowUnsupported(SAVEPOINTS_UNSUPPORTED);
}
@Override
public Savepoint setSavepoint(String name) throws SQLException {
return checkClosedAndThrowUnsupported(SAVEPOINTS_UNSUPPORTED);
}
@Override
public void rollback(Savepoint savepoint) throws SQLException {
checkClosedAndThrowUnsupported(SAVEPOINTS_UNSUPPORTED);
}
@Override
public void releaseSavepoint(Savepoint savepoint) throws SQLException {
checkClosedAndThrowUnsupported(SAVEPOINTS_UNSUPPORTED);
}
@Override
public SQLXML createSQLXML() throws SQLException {
return checkClosedAndThrowUnsupported(SQLXML_UNSUPPORTED);
}
@Override
public void setClientInfo(String name, String value) throws SQLClientInfoException {
Properties supported = null;
try {
checkClosed();
supported = JdbcDatabaseMetaData.getDefaultClientInfoProperties();
} catch (SQLException e) {
if (e instanceof JdbcSqlException) {
throw JdbcSqlExceptionFactory.clientInfoException(
e.getMessage(), ((JdbcSqlException) e).getCode());
} else {
throw JdbcSqlExceptionFactory.clientInfoException(e.getMessage(), Code.UNKNOWN);
}
}
if (value == null) {
throw JdbcSqlExceptionFactory.clientInfoException(
"Null-value is not allowed for client info.", Code.INVALID_ARGUMENT);
}
if (value.length() > JdbcDatabaseMetaData.MAX_CLIENT_INFO_VALUE_LENGTH) {
throw JdbcSqlExceptionFactory.clientInfoException(
String.format(
"Max length of value is %d characters.",
JdbcDatabaseMetaData.MAX_CLIENT_INFO_VALUE_LENGTH),
Code.INVALID_ARGUMENT);
}
name = name.toUpperCase();
if (supported.containsKey(name)) {
clientInfo.setProperty(name, value);
} else {
pushWarning(new SQLWarning(String.format(CLIENT_INFO_NOT_SUPPORTED, name)));
}
}
@Override
public void setClientInfo(Properties properties) throws SQLClientInfoException {
try {
checkClosed();
} catch (SQLException e) {
if (e instanceof JdbcSqlException) {
throw JdbcSqlExceptionFactory.clientInfoException(
e.getMessage(), ((JdbcSqlException) e).getCode());
} else {
throw JdbcSqlExceptionFactory.clientInfoException(e.getMessage(), Code.UNKNOWN);
}
}
clientInfo.clear();
for (String property : properties.stringPropertyNames()) {
setClientInfo(property, properties.getProperty(property));
}
}
@Override
public String getClientInfo(String name) throws SQLException {
checkClosed();
return clientInfo.getProperty(name.toUpperCase());
}
@Override
public Properties getClientInfo() throws SQLException {
checkClosed();
return (Properties) clientInfo.clone();
}
@Override
public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
return checkClosedAndThrowUnsupported(STRUCTS_UNSUPPORTED);
}
@Override
public void abort(Executor executor) throws SQLException {
checkClosedAndThrowUnsupported(ABORT_UNSUPPORTED);
}
@Override
public void setNetworkTimeout(Executor executor, int milliseconds) throws SQLException {
checkClosedAndThrowUnsupported(NETWORK_TIMEOUT_UNSUPPORTED);
}
@Override
public int getNetworkTimeout() throws SQLException {
return checkClosedAndThrowUnsupported(NETWORK_TIMEOUT_UNSUPPORTED);
}
@VisibleForTesting
void pushWarning(SQLWarning warning) {
if (lastWarning == null) {
firstWarning = warning;
lastWarning = warning;
} else {
lastWarning.setNextWarning(warning);
lastWarning = warning;
}
}
}