test/langtools/jdk/jshell/HangingRemoteAgent.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import jdk.jshell.JShell;
import jdk.jshell.execution.JdiExecutionControlProvider;
import jdk.jshell.execution.RemoteExecutionControl;
import jdk.jshell.spi.ExecutionControlProvider;

/**
 * HangingRemoteAgent main() runs in its loop for 2X the timeout
 * we give the launcher to fail to attach.
 */
class HangingRemoteAgent extends RemoteExecutionControl {

    private static float timeoutFactor = Float.parseFloat(System.getProperty("test.timeout.factor", "1.0"));

    private static final int TIMEOUT = (int)(2000 * timeoutFactor);
    private static final long DELAY = TIMEOUT * 2L;
    private static final boolean INFRA_VERIFY = false;

    public static void main(String[] args) throws Exception {
        if (INFRA_VERIFY) {
            RemoteExecutionControl.main(args);
        } else {
            long end = System.currentTimeMillis() + DELAY;
            long remaining;
            while ((remaining = end - System.currentTimeMillis()) > 0L) {
                try {
                    Thread.sleep(remaining);
                } catch (InterruptedException ex) {
                    // loop again
                }
            }
        }
    }

    static JShell state(boolean isLaunch, String host) {
        ExecutionControlProvider ecp = new JdiExecutionControlProvider();
        Map<String,String> pm = ecp.defaultParameters();
        pm.put(JdiExecutionControlProvider.PARAM_REMOTE_AGENT, HangingRemoteAgent.class.getName());
        pm.put(JdiExecutionControlProvider.PARAM_HOST_NAME, host==null? "" : host);
        pm.put(JdiExecutionControlProvider.PARAM_LAUNCH, ""+isLaunch);
        pm.put(JdiExecutionControlProvider.PARAM_TIMEOUT, ""+TIMEOUT);
        // turn on logging of launch failures
        Logger.getLogger("jdk.jshell.execution").setLevel(Level.ALL);
        return JShell.builder()
                .executionEngine(ecp, pm)
                .build();
    }

}