testtool-util/src/main/java/org/opendaylight/protocol/util/CheckUtil.java

   1 /*
   2  * Copyright (c) 2016 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.protocol.util;
   9
  10 import com.google.common.base.Optional;
  11 import com.google.common.base.Stopwatch;
  12 import com.google.common.util.concurrent.Uninterruptibles;
  13 import io.netty.util.concurrent.Future;
  14 import java.util.concurrent.CountDownLatch;
  15 import java.util.concurrent.TimeUnit;
  16 import java.util.function.Function;
  17 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  18 import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
  19 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  20 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  21 import org.opendaylight.yangtools.yang.binding.DataObject;
  22 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  23
  24 public final class CheckUtil {
  25     private static final int LATCH_TIMEOUT = 10;
  26     private static final int SLEEP_FOR = 200;
  27     private static final int TIMEOUT = 60;
  28
  29     private CheckUtil() {
  30         throw new UnsupportedOperationException();
  31     }
  32
  33     @SuppressWarnings("unchecked")
  34     public static <T extends Future> void waitFutureSuccess(final T future) {
  35         final CountDownLatch latch = new CountDownLatch(1);
  36         future.addListener(future1 -> latch.countDown());
  37         Uninterruptibles.awaitUninterruptibly(latch, LATCH_TIMEOUT, TimeUnit.SECONDS);
  38     }
  39
  40     public static <R, T extends DataObject> R readData(final DataBroker dataBroker, final InstanceIdentifier<T> iid,
  41         final Function<T, R> function) throws ReadFailedException {
  42         AssertionError lastError = null;
  43         final Stopwatch sw = Stopwatch.createStarted();
  44         while (sw.elapsed(TimeUnit.SECONDS) <= TIMEOUT) {
  45             try (final ReadOnlyTransaction tx = dataBroker.newReadOnlyTransaction()) {
  46                 final Optional<T> data = tx.read(LogicalDatastoreType.OPERATIONAL, iid).checkedGet();
  47                 if (data.isPresent()) {
  48                     try {
  49                         return function.apply(data.get());
  50                     } catch (final AssertionError e) {
  51                         lastError = e;
  52                         Uninterruptibles.sleepUninterruptibly(SLEEP_FOR, TimeUnit.MILLISECONDS);
  53                     }
  54                 }
  55             }
  56         }
  57         throw lastError;
  58     }
  59 }