spring DelegatingConnectionFactory 源码
spring DelegatingConnectionFactory 代码
文件路径：/spring-r2dbc/src/main/java/org/springframework/r2dbc/connection/DelegatingConnectionFactory.java
/*
* Copyright 2002-2020 the original author or authors.
*
* 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
*
* https://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.springframework.r2dbc.connection;
import io.r2dbc.spi.Connection;
import io.r2dbc.spi.ConnectionFactory;
import io.r2dbc.spi.ConnectionFactoryMetadata;
import io.r2dbc.spi.Wrapped;
import reactor.core.publisher.Mono;
import org.springframework.util.Assert;
/**
* R2DBC {@link ConnectionFactory} implementation that delegates
* all calls to a given target {@link ConnectionFactory}.
*
* <p>This class is meant to be subclassed, with subclasses overriding
* only those methods (such as {@link #create()}) that should not simply
* delegate to the target {@link ConnectionFactory}.
*
* @author Mark Paluch
* @since 5.3
* @see #create()
*/
public class DelegatingConnectionFactory implements ConnectionFactory, Wrapped<ConnectionFactory> {
private final ConnectionFactory targetConnectionFactory;
/**
* Create a new DelegatingConnectionFactory.
* @param targetConnectionFactory the target ConnectionFactory
*/
public DelegatingConnectionFactory(ConnectionFactory targetConnectionFactory) {
Assert.notNull(targetConnectionFactory, "ConnectionFactory must not be null");
this.targetConnectionFactory = targetConnectionFactory;
}
/**
* Return the target ConnectionFactory that this ConnectionFactory delegates to.
*/
public ConnectionFactory getTargetConnectionFactory() {
return this.targetConnectionFactory;
}
@Override
public Mono<? extends Connection> create() {
return Mono.from(this.targetConnectionFactory.create());
}
@Override
public ConnectionFactoryMetadata getMetadata() {
return this.targetConnectionFactory.getMetadata();
}
@Override
public ConnectionFactory unwrap() {
return this.targetConnectionFactory;
}
}
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