[karaf] branch karaf-4.3.x updated: [KARAF-7070] Add kill command to interrupt a thread

[jb...@apache.org]

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jbonofre pushed a commit to branch karaf-4.3.x
in repository https://gitbox.apache.org/repos/asf/karaf.git


The following commit(s) were added to refs/heads/karaf-4.3.x by this push:
     new 11b2a54  [KARAF-7070] Add kill command to interrupt a thread
11b2a54 is described below

commit 11b2a5404bc3536b6feaa422afcf8426ea5cabb9
Author: Jean-Baptiste Onofré <jb...@apache.org>
AuthorDate: Thu Nov 25 08:10:35 2021 +0100

    [KARAF-7070] Add kill command to interrupt a thread
    
    (cherry picked from commit d4f6a5152ae9fce33a038503dfeacfa1810ffc65)
---
 .../shell/commands/impl/ThreadKillAction.java      | 58 ++++++++++++++++++++++
 1 file changed, 58 insertions(+)

diff --git a/shell/commands/src/main/java/org/apache/karaf/shell/commands/impl/ThreadKillAction.java b/shell/commands/src/main/java/org/apache/karaf/shell/commands/impl/ThreadKillAction.java
new file mode 100644
index 0000000..8060918
--- /dev/null
+++ b/shell/commands/src/main/java/org/apache/karaf/shell/commands/impl/ThreadKillAction.java
@@ -0,0 +1,58 @@
+/*
+ * 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.karaf.shell.commands.impl;
+
+import org.apache.karaf.shell.api.action.Action;
+import org.apache.karaf.shell.api.action.Argument;
+import org.apache.karaf.shell.api.action.Command;
+import org.apache.karaf.shell.api.action.lifecycle.Service;
+
+@Command(scope = "shell", name = "kill", description = "Interrupt a given thread")
+@Service
+public class ThreadKillAction implements Action {
+
+    @Argument(name = "id", description = "Interrupt the thread with this id", required = true, multiValued = false)
+    Long id;
+
+    @Override
+    public Object execute() throws Exception {
+        ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
+        while (threadGroup.getParent() != null) {
+            threadGroup = threadGroup.getParent();
+        }
+
+        Thread[] threadList = new Thread[threadGroup.activeCount()];
+
+        int count = threadGroup.enumerate(threadList, true);
+        for (int i = 0; i < count; i++) {
+            if (threadList[i].getId() == id) {
+                try {
+                    System.out.println("Interrupting " + threadList[i].getName() + " (" + threadList[i].getId() + ")");
+                    threadList[i].interrupt();
+                } catch (Exception e) {
+                    System.err.println("Can't interrtupt: " + e.getMessage());
+                }
+                return null;
+            }
+        }
+
+        System.err.println("kill " + id + " failed: no such thread");
+
+        return null;
+    }
+
+}