X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?p=controller.git;a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-netconf-connector%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fsal%2Fconnect%2Fnetconf%2Flistener%2FUncancellableFuture.java;fp=opendaylight%2Fmd-sal%2Fsal-netconf-connector%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fsal%2Fconnect%2Fnetconf%2Flistener%2FUncancellableFuture.java;h=8d89ff8b93c73aefdd901c68bac7f79b148a5a32;hp=0000000000000000000000000000000000000000;hb=bee5972562efede5581a4655b439023837aa261c;hpb=82eb3f94c133e091ca5dd2f26450da9f121c12ca

diff --git a/opendaylight/md-sal/sal-netconf-connector/src/main/java/org/opendaylight/controller/sal/connect/netconf/listener/UncancellableFuture.java b/opendaylight/md-sal/sal-netconf-connector/src/main/java/org/opendaylight/controller/sal/connect/netconf/listener/UncancellableFuture.java
new file mode 100644
index 0000000000..8d89ff8b93
--- /dev/null
+++ b/opendaylight/md-sal/sal-netconf-connector/src/main/java/org/opendaylight/controller/sal/connect/netconf/listener/UncancellableFuture.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.controller.sal.connect.netconf.listener;
+
+import javax.annotation.Nullable;
+import javax.annotation.concurrent.GuardedBy;
+
+import com.google.common.base.Preconditions;
+import com.google.common.util.concurrent.AbstractFuture;
+
+final class UncancellableFuture<V> extends AbstractFuture<V> {
+    @GuardedBy("this")
+    private boolean uncancellable = false;
+
+    public UncancellableFuture(final boolean uncancellable) {
+        this.uncancellable = uncancellable;
+    }
+
+    public synchronized boolean setUncancellable() {
+        if (isCancelled()) {
+            return false;
+        }
+
+        uncancellable = true;
+        return true;
+    }
+
+    public synchronized boolean isUncancellable() {
+        return uncancellable;
+    }
+
+    @Override
+    public synchronized boolean cancel(final boolean mayInterruptIfRunning) {
+        return uncancellable ? false : super.cancel(mayInterruptIfRunning);
+    }
+
+    @Override
+    public synchronized boolean set(@Nullable final V value) {
+        Preconditions.checkState(uncancellable);
+        return super.set(value);
+    }
+
+    @Override
+    protected boolean setException(final Throwable throwable) {
+        Preconditions.checkState(uncancellable);
+        return super.setException(throwable);
+    }
+}