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the hasor DataBase project.
/*
* Copyright 2008-2009 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
*
* 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 net.hasor.db;
import net.hasor.core.ApiBinder;
import net.hasor.core.MethodInterceptor;
import net.hasor.core.MethodInvocation;
import net.hasor.core.Module;
import net.hasor.core.exts.aop.Matchers;
import net.hasor.db.jdbc.JdbcOperations;
import net.hasor.db.jdbc.core.JdbcAccessor;
import net.hasor.db.jdbc.core.JdbcConnection;
import net.hasor.db.jdbc.core.JdbcTemplate;
import net.hasor.db.jdbc.core.JdbcTemplateProvider;
import net.hasor.db.transaction.*;
import net.hasor.db.transaction.provider.TransactionManagerProvider;
import net.hasor.db.transaction.provider.TransactionTemplateProvider;
import net.hasor.utils.StringUtils;
import javax.sql.DataSource;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;
import java.util.function.Predicate;
import java.util.function.Supplier;
/**
* DB 模块。
* @author 赵永春 ([email protected])
* @version : 2017-03-23
*/
public class JdbcModule implements Module {
private final Set loadLevel;
private final String dataSourceID;
private final Supplier dataSource;
/** 添加数据源 */
public JdbcModule(Level loadLevel, DataSource dataSource) {
this(new Level[] { loadLevel }, null, of(Objects.requireNonNull(dataSource)));
}
/** 添加数据源 */
public JdbcModule(Level loadLevel, Supplier dataSource) {
this(new Level[] { loadLevel }, null, dataSource);
}
/** 添加数据源 */
public JdbcModule(Level loadLevel, String name, DataSource dataSource) {
this(new Level[] { loadLevel }, name, of(Objects.requireNonNull(dataSource)));
}
/** 添加数据源 */
public JdbcModule(Level[] loadLevel, DataSource dataSource) {
this(loadLevel, null, of(Objects.requireNonNull(dataSource)));
}
/** 添加数据源 */
public JdbcModule(Level[] loadLevel, Supplier dataSource) {
this(loadLevel, null, dataSource);
}
/** 添加数据源 */
public JdbcModule(Level[] loadLevel, String name, Supplier dataSource) {
Objects.requireNonNull(loadLevel, "loadLevel is null.");
Objects.requireNonNull(dataSource, "dataSource Provider is null.");
this.loadLevel = new HashSet<>(Arrays.asList(loadLevel));
this.dataSourceID = name;
this.dataSource = dataSource;
}
private static Supplier of(T instance) {
return () -> instance;
}
@Override
public void loadModule(ApiBinder apiBinder) throws Throwable {
boolean loadData = this.loadLevel.contains(Level.Full) || this.loadLevel.contains(Level.DataSource);
boolean loadJdbc = this.loadLevel.contains(Level.Full) || this.loadLevel.contains(Level.Jdbc);
boolean loadTran = this.loadLevel.contains(Level.Full) || this.loadLevel.contains(Level.Tran);
//
if (loadData) {
if (StringUtils.isBlank(this.dataSourceID)) {
apiBinder.bindType(DataSource.class).toProvider(this.dataSource);
} else {
apiBinder.bindType(DataSource.class).nameWith(this.dataSourceID).toProvider(this.dataSource);
}
}
//
if (loadJdbc) {
JdbcTemplateProvider tempProvider = new JdbcTemplateProvider(this.dataSource);
if (StringUtils.isBlank(this.dataSourceID)) {
apiBinder.bindType(JdbcAccessor.class).toProvider(tempProvider);
apiBinder.bindType(JdbcConnection.class).toProvider(tempProvider);
apiBinder.bindType(JdbcTemplate.class).toProvider(tempProvider);
apiBinder.bindType(JdbcOperations.class).toProvider(tempProvider);
} else {
apiBinder.bindType(JdbcAccessor.class).nameWith(this.dataSourceID).toProvider(tempProvider);
apiBinder.bindType(JdbcConnection.class).nameWith(this.dataSourceID).toProvider(tempProvider);
apiBinder.bindType(JdbcTemplate.class).nameWith(this.dataSourceID).toProvider(tempProvider);
apiBinder.bindType(JdbcOperations.class).nameWith(this.dataSourceID).toProvider(tempProvider);
}
}
//
if (loadTran) {
Supplier managerProvider = new TransactionManagerProvider(this.dataSource);
Supplier templateProvider = new TransactionTemplateProvider(this.dataSource);
if (StringUtils.isBlank(this.dataSourceID)) {
apiBinder.bindType(TransactionManager.class).toProvider(managerProvider);
apiBinder.bindType(TransactionTemplate.class).toProvider(templateProvider);
} else {
apiBinder.bindType(TransactionManager.class).nameWith(this.dataSourceID).toProvider(managerProvider);
apiBinder.bindType(TransactionTemplate.class).nameWith(this.dataSourceID).toProvider(templateProvider);
}
TranInterceptor tranInter = new TranInterceptor(this.dataSource);
Predicate> matcherClass = Matchers.annotatedWithClass(Transactional.class);
Predicate matcherMethod = Matchers.annotatedWithMethod(Transactional.class);
apiBinder.bindInterceptor(matcherClass, matcherMethod, tranInter);
}
}
private static class TranInterceptor implements MethodInterceptor {
private Supplier dataSource = null;
public TranInterceptor(Supplier dataSource) {
this.dataSource = Objects.requireNonNull(dataSource, "dataSource Provider is null.");
}
/*是否不需要回滚:true表示不要回滚*/
private boolean testNoRollBackFor(Transactional tranAnno, Throwable e) {
//1.test Class
Class[] noRollBackType = tranAnno.noRollbackFor();
for (Class cls : noRollBackType) {
if (cls.isInstance(e)) {
return true;
}
}
//2.test Name
String[] noRollBackName = tranAnno.noRollbackForClassName();
String errorType = e.getClass().getName();
for (String name : noRollBackName) {
if (errorType.equals(name)) {
return true;
}
}
return false;
}
@Override
public final Object invoke(final MethodInvocation invocation) throws Throwable {
Method targetMethod = invocation.getMethod();
Transactional tranInfo = tranAnnotation(targetMethod);
if (tranInfo == null) {
return invocation.proceed();
}
//0.准备事务环境
DataSource dataSource = this.dataSource.get();
TransactionManager manager = TranManager.getManager(dataSource);
Propagation behavior = tranInfo.propagation();
Isolation level = tranInfo.isolation();
TransactionStatus tranStatus = manager.getTransaction(behavior, level);
//1.只读事务
if (tranInfo.readOnly()) {
tranStatus.setReadOnly();
}
//2.事务行为控制
try {
return invocation.proceed();
} catch (Throwable e) {
if (!this.testNoRollBackFor(tranInfo, e)) {
tranStatus.setRollbackOnly();
}
throw e;
} finally {
if (!tranStatus.isCompleted()) {
manager.commit(tranStatus);
}
}
}
/** 在方法上找 Transactional ，如果找不到在到 类上找 Transactional ，如果依然没有，那么在所处的包(包括父包)上找 Transactional。*/
private Transactional tranAnnotation(Method targetMethod) {
Transactional tran = targetMethod.getAnnotation(Transactional.class);
if (tran == null) {
Class declaringClass = targetMethod.getDeclaringClass();
tran = declaringClass.getAnnotation(Transactional.class);
}
return tran;
}
}
}
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