Split sandbox code from standalone module.

--
MOS_MIGRATED_REVID=97126283
diff --git a/src/main/java/com/google/devtools/build/lib/sandbox/SandboxModule.java b/src/main/java/com/google/devtools/build/lib/sandbox/SandboxModule.java
new file mode 100644
index 0000000..65d0c15
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/sandbox/SandboxModule.java
@@ -0,0 +1,54 @@
+// Copyright 2015 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.sandbox;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.eventbus.Subscribe;
+import com.google.devtools.build.lib.actions.ActionContextConsumer;
+import com.google.devtools.build.lib.actions.ActionContextProvider;
+import com.google.devtools.build.lib.buildtool.BuildRequest;
+import com.google.devtools.build.lib.buildtool.buildevent.BuildStartingEvent;
+import com.google.devtools.build.lib.runtime.BlazeModule;
+import com.google.devtools.build.lib.runtime.BlazeRuntime;
+import com.google.devtools.build.lib.runtime.Command;
+
+/**
+ * This module provides the Sandbox spawn strategy.
+ */
+public class SandboxModule extends BlazeModule {
+  private BuildRequest buildRequest;
+  private BlazeRuntime runtime;
+
+  @Override
+  public Iterable<ActionContextProvider> getActionContextProviders() {
+    return ImmutableList.<ActionContextProvider>of(
+        new SandboxActionContextProvider(runtime, buildRequest));
+  }
+
+  @Override
+  public Iterable<ActionContextConsumer> getActionContextConsumers() {
+    return ImmutableList.<ActionContextConsumer>of(new SandboxActionContextConsumer());
+  }
+
+  @Override
+  public void beforeCommand(BlazeRuntime runtime, Command command) {
+    this.runtime = runtime;
+    runtime.getEventBus().register(this);
+  }
+
+  @Subscribe
+  public void buildStarting(BuildStartingEvent event) {
+    buildRequest = event.getRequest();
+  }
+}