| // Copyright 2014 The Bazel Authors. 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.actions; |
| |
| /** A mutable action graph. Implementations of this interface must be thread-safe. */ |
| public interface MutableActionGraph extends ActionGraph { |
| |
| /** |
| * Attempts to register the action. If any of the action's outputs already has a generating |
| * action, and the two actions are not compatible, then an {@link ActionConflictException} is |
| * thrown. The internal data structure may be partially modified when that happens; it is not |
| * guaranteed that all potential conflicts are detected, but at least one of them is. |
| * |
| * <p>For example, take three actions A, B, and C, where A creates outputs a and b, B creates just |
| * b, and C creates c and b. There are two potential conflicts in this case, between A and B, and |
| * between B and C. Depending on the ordering of calls to this method and the ordering of outputs |
| * in the action output lists, either one or two conflicts are detected: if B is registered first, |
| * then both conflicts are detected; if either A or C is registered first, then only one conflict |
| * is detected. |
| */ |
| void registerAction(ActionAnalysisMetadata action) |
| throws ActionConflictException, InterruptedException; |
| |
| /** Returns the size of the action graph. */ |
| int getSize(); |
| } |