HONEYCOMB-61: Detect VPP disconnect using keepalives

Change-Id: Ic664dbf452504d0fff97e8c766d735d9c5d95c72
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>

2 files changed, 56 insertions, 0 deletions

diff --git a/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/ReadTimeoutException.java b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/ReadTimeoutException.java
new file mode 100644
index 000000000..654b13825
--- /dev/null
+++ b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/ReadTimeoutException.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * 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 io.fd.honeycomb.v3po.translate.v3po.util;
+
+import com.google.common.annotations.Beta;
+import io.fd.honeycomb.v3po.translate.read.ReadFailedException;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * Thrown when read method invocation times out.
+ */
+@Beta
+public class ReadTimeoutException extends ReadFailedException {
+
+    public ReadTimeoutException(final InstanceIdentifier<?> id, final Throwable cause) {
+        super(id, cause);
+    }
+
+}
diff --git a/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/TranslateUtils.java b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/TranslateUtils.java
index 9f6f1f676..f14b2eb6d 100644
--- a/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/TranslateUtils.java
+++ b/v3po/vpp-translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/v3po/util/TranslateUtils.java
@@ -22,10 +22,14 @@ import com.google.common.base.Splitter;
 import java.util.List;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
 import java.util.function.BiConsumer;
+import javax.annotation.Nonnegative;
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4AddressNoZone;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
 import org.openvpp.jvpp.dto.JVppReply;
 
 public final class TranslateUtils {
@@ -49,6 +53,25 @@ public final class TranslateUtils {
         }
     }
 
+    public static <REP extends JVppReply<?>> REP getReply(@Nonnull Future<REP> future,
+                                                          @Nonnull final InstanceIdentifier<?> replyType,
+                                                          @Nonnegative final int timeoutInSeconds)
+        throws ReadTimeoutException {
+        try {
+            checkArgument(timeoutInSeconds > 0, "Timeout cannot be < 0");
+            return future.get(timeoutInSeconds, TimeUnit.SECONDS);
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+            throw new IllegalStateException("Interrupted", e);
+        } catch (ExecutionException e) {
+            // Execution exception should not occur, since we are using return codes for errors
+            // TODO fix when using exceptions instead of return codes
+            throw new IllegalArgumentException("Future " + " should not fail with an exception", e);
+        } catch (TimeoutException e) {
+            throw new ReadTimeoutException(replyType, e);
+        }
+    }
+
     public static byte[] ipv4AddressNoZoneToArray(final Ipv4AddressNoZone ipv4Addr) {
         byte[] retval = new byte[4];
         String[] dots = ipv4Addr.getValue().split("\\.");