Initial commit for spark

1 files changed, 72 insertions, 0 deletions

diff --git a/common/src/main/java/com/sk89q/warmroast/ThreadDumper.java b/common/src/main/java/com/sk89q/warmroast/ThreadDumper.java
new file mode 100644
index 0000000..6c25daf
--- /dev/null
+++ b/common/src/main/java/com/sk89q/warmroast/ThreadDumper.java
@@ -0,0 +1,72 @@
+/*
+ * WarmRoast
+ * Copyright (C) 2013 Albert Pham <http://www.sk89q.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.warmroast;
+
+import java.lang.management.ThreadInfo;
+import java.lang.management.ThreadMXBean;
+
+/**
+ * Uses the {@link ThreadMXBean} to generate {@link ThreadInfo} instances for the threads being
+ * sampled.
+ */
+@FunctionalInterface
+public interface ThreadDumper {
+
+    /**
+     * Generates {@link ThreadInfo} data for the sampled threads.
+     *
+     * @param threadBean the thread bean instance to obtain the data from
+     * @return an array of generated thread info instances
+     */
+    ThreadInfo[] dumpThreads(ThreadMXBean threadBean);
+
+    /**
+     * Implementation of {@link ThreadDumper} that generates data for all threads.
+     */
+    final class All implements ThreadDumper {
+        @Override
+        public ThreadInfo[] dumpThreads(ThreadMXBean threadBean) {
+            return threadBean.dumpAllThreads(false, false);
+        }
+    }
+
+    /**
+     * Implementation of {@link ThreadDumper} that generates data for a specific set of threads.
+     */
+    final class Specific implements ThreadDumper {
+        private final long[] ids;
+
+        public Specific(long[] ids) {
+            this.ids = ids;
+        }
+
+        public Specific(String name) {
+            this.ids = Thread.getAllStackTraces().keySet().stream()
+                    .filter(t -> t.getName().equalsIgnoreCase(name))
+                    .mapToLong(Thread::getId)
+                    .toArray();
+        }
+
+        @Override
+        public ThreadInfo[] dumpThreads(ThreadMXBean threadBean) {
+            return threadBean.getThreadInfo(this.ids, Integer.MAX_VALUE);
+        }
+    }
+
+}