forked from apache/shardingsphere
/
DatabaseCommunicationEngineFactory.java
82 lines (74 loc) · 3.78 KB
/
DatabaseCommunicationEngineFactory.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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 org.apache.shardingsphere.proxy.backend.communication;
import lombok.AccessLevel;
import lombok.NoArgsConstructor;
import org.apache.shardingsphere.infra.binder.LogicSQL;
import org.apache.shardingsphere.infra.binder.statement.SQLStatementContext;
import org.apache.shardingsphere.infra.executor.sql.prepare.driver.jdbc.JDBCDriverType;
import org.apache.shardingsphere.infra.metadata.ShardingSphereMetaData;
import org.apache.shardingsphere.proxy.backend.communication.jdbc.connection.JDBCBackendConnection;
import org.apache.shardingsphere.proxy.backend.context.ProxyContext;
import java.util.Collections;
import java.util.List;
/**
* Database communication engine factory.
*/
@NoArgsConstructor(access = AccessLevel.PRIVATE)
public final class DatabaseCommunicationEngineFactory {
private static final DatabaseCommunicationEngineFactory INSTANCE = new DatabaseCommunicationEngineFactory();
/**
* Get backend handler factory instance.
*
* @return backend handler factory
*/
public static DatabaseCommunicationEngineFactory getInstance() {
return INSTANCE;
}
/**
* Create new instance of text protocol backend handler.
*
* @param sqlStatementContext SQL statement context
* @param sql SQL to be executed
* @param backendConnection backend connection
* @return text protocol backend handler
*/
public DatabaseCommunicationEngine newTextProtocolInstance(final SQLStatementContext<?> sqlStatementContext, final String sql, final JDBCBackendConnection backendConnection) {
ShardingSphereMetaData metaData = ProxyContext.getInstance().getMetaData(backendConnection.getConnectionSession().getSchemaName());
LogicSQL logicSQL = new LogicSQL(sqlStatementContext, sql, Collections.emptyList());
DatabaseCommunicationEngine result = new DatabaseCommunicationEngine(JDBCDriverType.STATEMENT, metaData, logicSQL, backendConnection);
backendConnection.add(result);
return result;
}
/**
* Create new instance of binary protocol backend handler.
*
* @param sqlStatementContext SQL statement context
* @param sql SQL to be executed
* @param parameters SQL parameters
* @param backendConnection backend connection
* @return binary protocol backend handler
*/
public DatabaseCommunicationEngine newBinaryProtocolInstance(final SQLStatementContext<?> sqlStatementContext, final String sql,
final List<Object> parameters, final JDBCBackendConnection backendConnection) {
ShardingSphereMetaData metaData = ProxyContext.getInstance().getMetaData(backendConnection.getConnectionSession().getSchemaName());
LogicSQL logicSQL = new LogicSQL(sqlStatementContext, sql, parameters);
DatabaseCommunicationEngine result = new DatabaseCommunicationEngine(JDBCDriverType.PREPARED_STATEMENT, metaData, logicSQL, backendConnection);
backendConnection.add(result);
return result;
}
}