[6/6] flink git commit: Add our own Deadline implementation

[al...@apache.org]

Add our own Deadline implementation


Project: http://git-wip-us.apache.org/repos/asf/flink/repo
Commit: http://git-wip-us.apache.org/repos/asf/flink/commit/c4861250
Tree: http://git-wip-us.apache.org/repos/asf/flink/tree/c4861250
Diff: http://git-wip-us.apache.org/repos/asf/flink/diff/c4861250

Branch: refs/heads/release-1.5
Commit: c48612501b14174a04c7d1ad31c1e34de5e59854
Parents: 9e253b5
Author: Aljoscha Krettek <al...@gmail.com>
Authored: Wed Feb 28 15:06:59 2018 +0100
Committer: Aljoscha Krettek <al...@gmail.com>
Committed: Sun Mar 11 08:31:56 2018 -0700

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 .../apache/flink/api/common/time/Deadline.java  | 68 ++++++++++++++++++++
 1 file changed, 68 insertions(+)
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http://git-wip-us.apache.org/repos/asf/flink/blob/c4861250/flink-core/src/main/java/org/apache/flink/api/common/time/Deadline.java
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diff --git a/flink-core/src/main/java/org/apache/flink/api/common/time/Deadline.java b/flink-core/src/main/java/org/apache/flink/api/common/time/Deadline.java
new file mode 100644
index 0000000..2db6579
--- /dev/null
+++ b/flink-core/src/main/java/org/apache/flink/api/common/time/Deadline.java
@@ -0,0 +1,68 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 org.apache.flink.api.common.time;
+
+import org.apache.flink.annotation.Internal;
+
+import java.time.Duration;
+
+/**
+ * This class stores a deadline, as obtained via {@link #now()} or from {@link #plus(Duration)}.
+ */
+@Internal
+public class Deadline {
+	private final long timeNanos;
+
+	private Deadline(Duration time) {
+		this.timeNanos = time.toNanos();
+	}
+
+	public Deadline plus(Duration other) {
+		return new Deadline(Duration.ofNanos(timeNanos).plus(other));
+	}
+
+	/**
+	 * Returns the time left between the deadline and now. The result is negative if the deadline
+	 * has passed.
+	 */
+	public Duration timeLeft() {
+		return Duration.ofNanos(timeNanos).minus(Duration.ofNanos(System.nanoTime()));
+	}
+
+	/**
+	 * Returns whether there is any time left between the deadline and now.
+	 */
+	public boolean hasTimeLeft() {
+		return !isOverdue();
+	}
+
+	/**
+	 * Determines whether the deadline is in the past, i.e. whether the time left is negative.
+	 */
+	public boolean isOverdue() {
+		return timeNanos - System.nanoTime() < 0;
+	}
+
+	/**
+	 * Constructs a {@link Deadline} that has now as the deadline. Use this and then extend via
+	 * {@link #plus(Duration)} to specify a deadline in the future.
+	 */
+	public static Deadline now() {
+		return new Deadline(Duration.ofNanos(System.nanoTime()));
+	}
+}