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package testsuite.regression.jdbc42;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

import com.mysql.jdbc.ConnectionImpl;
import com.mysql.jdbc.MysqlIO;
import com.mysql.jdbc.SQLError;

import testsuite.BaseTestCase;

public class ConnectionRegressionTest extends BaseTestCase {

    public ConnectionRegressionTest(String name) {

     * Tests fix for Bug#75615 - Incorrect implementation of Connection.setNetworkTimeout().
     * Note: this test exploits a non deterministic race condition. Usually the failure was observed under 10 consecutive executions, as such the siginficant
     * part of the test is run up to 25 times.
    private Future<?> testBug75615Future = null;

    public void testBug75615() throws Exception {
        // Main use case: although this could cause an exception due to a race condition in MysqlIO.mysqlConnection it is silently swallowed within the running
        // thread.
        final Connection testConn1 = getConnectionWithProps("");
        testConn1.setNetworkTimeout(Executors.newSingleThreadExecutor(), 1000);

        // Main use case simulation: this simulates the above by capturing an eventual exeption in the main thread. This is where this test would actually fail.
        // This part is repeated several times to increase the chance of hitting the reported bug.
        for (int i = 0; i < 25; i++) {
            final ExecutorService execService = Executors.newSingleThreadExecutor();
            final Connection testConn2 = getConnectionWithProps("");
            testConn2.setNetworkTimeout(new Executor() {
                public void execute(Runnable command) {
                    // Attach the future to the parent object so that it can track the exception in the main thread.
                    ConnectionRegressionTest.this.testBug75615Future = execService.submit(command);
            }, 1000);
            try {
            } catch (ExecutionException e) {
                fail("Exception thrown in the thread that was setting the network timeout: " + e.getCause());

        // Test the expected exception on null executor.
        assertThrows(SQLException.class, "Executor can not be null", new Callable<Void>() {
            public Void call() throws Exception {
                Connection testConn = getConnectionWithProps("");
                testConn.setNetworkTimeout(null, 1000);
                return null;