1 files changed, 71 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/runtime/commands/ShutdownCommand.java b/src/main/java/com/google/devtools/build/lib/runtime/commands/ShutdownCommand.java
new file mode 100644
index 0000000000..fb9ba39f37
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/runtime/commands/ShutdownCommand.java
@@ -0,0 +1,71 @@
+// Copyright 2014 Google Inc. All rights reserved.
+//
+// Licensed 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 com.google.devtools.build.lib.runtime.commands;
+
+import com.google.devtools.build.lib.runtime.BlazeCommand;
+import com.google.devtools.build.lib.runtime.BlazeCommandDispatcher.ShutdownBlazeServerException;
+import com.google.devtools.build.lib.runtime.BlazeRuntime;
+import com.google.devtools.build.lib.runtime.Command;
+import com.google.devtools.build.lib.util.ExitCode;
+import com.google.devtools.common.options.Option;
+import com.google.devtools.common.options.OptionsBase;
+import com.google.devtools.common.options.OptionsParser;
+import com.google.devtools.common.options.OptionsProvider;
+
+/**
+ * The 'blaze shutdown' command.
+ */
+@Command(name = "shutdown",
+         options = { ShutdownCommand.Options.class },
+         allowResidue = false,
+         mustRunInWorkspace = false,
+         shortDescription = "Stops the Blaze server.",
+         help = "This command shuts down the memory resident Blaze server process.\n%{options}")
+public final class ShutdownCommand implements BlazeCommand {
+
+  public static class Options extends OptionsBase {
+
+    @Option(name="iff_heap_size_greater_than",
+            defaultValue = "0",
+            category = "misc",
+            help="Iff non-zero, then shutdown will only shut down the " +
+                 "server if the total memory (in MB) consumed by the JVM " +
+                 "exceeds this value.")
+    public int heapSizeLimit;
+  }
+
+  @Override
+  public void editOptions(BlazeRuntime runtime, OptionsParser optionsParser) {}
+
+  @Override
+  public ExitCode exec(BlazeRuntime runtime, OptionsProvider options)
+      throws ShutdownBlazeServerException {
+
+    int limit = options.getOptions(Options.class).heapSizeLimit;
+
+    // Iff limit is non-zero, shut down the server if total memory exceeds the
+    // limit. totalMemory is the actual heap size that the VM currently uses
+    // *from the OS perspective*. That is, it's not the size occupied by all
+    // objects (which is totalMemory() - freeMemory()), and not the -Xmx
+    // (which is maxMemory()). It's really how much memory this process
+    // currently consumes, in addition to the JVM code and C heap.
+
+    if (limit == 0 ||
+        Runtime.getRuntime().totalMemory() > limit * 1000L * 1000) {
+      throw new ShutdownBlazeServerException(0);
+    }
+    return ExitCode.SUCCESS;
+  }
+
+}