fe/fe-core/src/test/java/org/apache/doris/service/ExecuteEnvTest.java

// 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.doris.service;

import org.junit.Assert;
import org.junit.Test;

import javax.validation.constraints.AssertTrue;
import java.util.HashSet;
import java.util.Set;

public class ExecuteEnvTest {
    int THREAD_MAX_NUM = 10;
    int[] oids = new int[THREAD_MAX_NUM];

    @Test
    public void testGetInstance() {
        Set<Thread> tds = new HashSet<Thread>();
        for (int i = 0 ;i < THREAD_MAX_NUM; i++) {
            Thread td = new Thread(new MyTest(i, oids));
            tds.add(td);
            td.start();
        }

        for (Thread td : tds) {
            try {
                td.join();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        for (int i = 1; i < THREAD_MAX_NUM; i++) {
            Assert.assertEquals(oids[i-1], oids[i]);
        }
    }
}

class MyTest implements Runnable {
    public int index;
    public int[] oids;

    MyTest(int index, int[] oids) {
        this.index = index;
        this.oids = oids;
    }

    @Override
    public void run() {
        ExecuteEnv instance = ExecuteEnv.getInstance();
        int oid = instance.hashCode();
        oids[index] = oid;
    }
}