@Override public Mapping map(Task task, MappingWorksheet ws) { // build consistent hash for each work chunk List<ConsistentHash<ExecutorChunk>> hashes = new ArrayList<ConsistentHash<ExecutorChunk>>(ws.works.size()); for (int i=0; i<ws.works.size(); i++) { ConsistentHash<ExecutorChunk> hash = new ConsistentHash<ExecutorChunk>(new Hash<ExecutorChunk>() { public String hash(ExecutorChunk node) { return node.getName(); } }); // Build a Map to pass in rather than repeatedly calling hash.add() because each call does lots of expensive work List<ExecutorChunk> chunks = ws.works(i).applicableExecutorChunks(); Map<ExecutorChunk, Integer> toAdd = Maps.newHashMapWithExpectedSize(chunks.size()); for (ExecutorChunk ec : chunks) { toAdd.put(ec, ec.size()*100); } hash.addAll(toAdd); hashes.add(hash); } // do a greedy assignment Mapping m = ws.new Mapping(); assert m.size()==ws.works.size(); // just so that you the reader of the source code don't get confused with the for loop index if (assignGreedily(m,task,hashes,0)) { assert m.isCompletelyValid(); return m; } else return null; }
hash.addAll(hashSource);
@Override public Mapping map(Task task, MappingWorksheet ws) { // build consistent hash for each work chunk List<ConsistentHash<ExecutorChunk>> hashes = new ArrayList<ConsistentHash<ExecutorChunk>>(ws.works.size()); for (int i=0; i<ws.works.size(); i++) { ConsistentHash<ExecutorChunk> hash = new ConsistentHash<ExecutorChunk>(new Hash<ExecutorChunk>() { public String hash(ExecutorChunk node) { return node.getName(); } }); // Build a Map to pass in rather than repeatedly calling hash.add() because each call does lots of expensive work List<ExecutorChunk> chunks = ws.works(i).applicableExecutorChunks(); Map<ExecutorChunk, Integer> toAdd = Maps.newHashMapWithExpectedSize(chunks.size()); for (ExecutorChunk ec : chunks) { toAdd.put(ec, ec.size()*100); } hash.addAll(toAdd); hashes.add(hash); } // do a greedy assignment Mapping m = ws.new Mapping(); assert m.size()==ws.works.size(); // just so that you the reader of the source code don't get confused with the for loop index if (assignGreedily(m,task,hashes,0)) { assert m.isCompletelyValid(); return m; } else return null; }
hash.addAll(hashSource);