com.lsq.springboot.datasource.starter.MultiDataSourceUtil Maven / Gradle / Ivy

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/*
 * Copyright 2018 the organization loushi135
 *
 * 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.lsq.springboot.datasource.starter;

import com.lsq.springboot.datasource.starter.annotation.DsGroup;
import com.lsq.springboot.datasource.starter.annotation.Slave;
import org.aopalliance.intercept.MethodInvocation;
import org.apache.commons.lang3.StringUtils;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.transaction.support.TransactionSynchronizationManager;

import java.lang.reflect.Method;

public class MultiDataSourceUtil {

    public static String determineDsGroupFromAnnontation(MethodInvocation invocation) {
        Method method = invocation.getMethod();
        Class declaringClass = invocation.getThis().getClass();
        DsGroup ds = method.isAnnotationPresent(DsGroup.class) ? method.getAnnotation(DsGroup.class)
                : AnnotationUtils.findAnnotation(declaringClass, DsGroup.class);
        String dsGroup = ds.value();

        //spring spel 表达式
        if (SpelUtil.isSpel(dsGroup)) {
            dsGroup = SpelUtil.parseSpel(dsGroup, invocation);
        }
        return dsGroup;
    }


    public static String determineMasterSlave(MethodInvocation invocation) {
        Method method = invocation.getMethod();
        Class declaringClass = invocation.getThis().getClass();
        Slave slave = method.isAnnotationPresent(Slave.class) ? method.getAnnotation(Slave.class)
                : AnnotationUtils.findAnnotation(declaringClass, Slave.class);

        //@Slave注解没有 或者在事务中，设置为MASTER
        if (null == slave || isExistingTransaction()) {
            return DataSourceTypeEnum.MASTER.name();
        }

        boolean isSlave = slave.isSlave();

        if (StringUtils.isNotBlank(slave.spel()) && SpelUtil.isSpel(slave.spel())) {
            isSlave = Boolean.valueOf(SpelUtil.parseSpel(slave.spel(), invocation));
        }

        return isSlave ? DataSourceTypeEnum.SLAVE.name() : DataSourceTypeEnum.MASTER.name();
    }

    /**
     * 当前是否在事务中
     *
     * @return
     */
    private static boolean isExistingTransaction() {
        return TransactionSynchronizationManager.isActualTransactionActive();
    }

}