8066191: Introduce time limited test executor

Reviewed-by: vlivanov, psandoz

jdk/test/lib/testlibrary/jdk/testlibrary/TimeLimitedRunner.java

@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * 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.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.testlibrary;
+
+import java.util.Objects;
+import java.util.concurrent.Callable;
+
+/**
+ * Auxiliary class to run target w/ given timeout.
+ */
+public class TimeLimitedRunner implements Callable<Void> {
+    private final long              stoptime;
+    private final long              timeout;
+    private final double            factor;
+    private final Callable<Boolean> target;
+
+    /**
+     * @param timeout   a timeout. zero means no time limitation
+     * @param factor    a multiplier used to estimate next iteration time
+     * @param target    a target to run
+     * @throws NullPointerException     if target is null
+     * @throws IllegalArgumentException if timeout is negative or
+                                        factor isn't positive
+     */
+    public TimeLimitedRunner(long timeout, double factor,
+            Callable<Boolean> target) {
+        Objects.requireNonNull(target, "target must not be null");
+        if (timeout < 0) {
+            throw new IllegalArgumentException("timeout[" + timeout + "] < 0");
+        }
+        if (factor <= 0d) {
+            throw new IllegalArgumentException("factor[" + factor + "] <= 0");
+        }
+        this.stoptime = System.currentTimeMillis() + timeout;
+        this.timeout = timeout;
+        this.factor = factor;
+        this.target = target;
+    }
+
+    /**
+     * Runs @{linkplan target} while it returns true and timeout isn't exceeded
+     */
+    @Override
+    public Void call() throws Exception {
+        long maxDuration = 0L;
+        long iterStart = System.currentTimeMillis();
+        if (timeout != 0 && iterStart > stoptime) {
+            return null;
+        }
+        while (target.call()) {
+            if (timeout != 0) {
+                long iterDuration = System.currentTimeMillis() - iterStart;
+                maxDuration = Math.max(maxDuration, iterDuration);
+                iterStart = System.currentTimeMillis();
+                if (iterStart + (maxDuration * factor) > stoptime) {
+                    System.out.println("Not enough time to continue execution. "
+                            + "Interrupted.");
+                    break;
+                }
+            }
+        }
+        return null;
+    }
+
+}