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197 changes: 197 additions & 0 deletions
197
gapic/src/main/com/google/gapid/util/StatusWatcher.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,197 @@ | ||
| /* | ||
| * Copyright (C) 2017 Google Inc. | ||
| * | ||
| * 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.gapid.util; | ||
|
|
||
| import com.google.common.collect.Maps; | ||
| import com.google.gapid.proto.service.Service; | ||
| import com.google.gapid.server.Client; | ||
|
|
||
| import java.util.HashMap; | ||
| import java.util.LinkedHashMap; | ||
|
|
||
| /** | ||
| * Utility class for monitoring the server status. | ||
| */ | ||
| public class StatusWatcher { | ||
| private static final float STATUS_UPDATE_INTERVAL_S = 0.5f; | ||
| private static final float MEMORY_UPDATE_INTERVAL_S = 1.0f; | ||
|
|
||
| private final Listener listener; | ||
| private final Task root = Task.newRoot(); | ||
| private final HashMap<Long, Task> tasks = Maps.newHashMap(); | ||
| private String shownSummary = ""; | ||
|
|
||
| public StatusWatcher(Client client, Listener listener) { | ||
| this.listener = listener; | ||
|
|
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| client.streamStatus(MEMORY_UPDATE_INTERVAL_S, STATUS_UPDATE_INTERVAL_S, update -> { | ||
| switch (update.getResCase()) { | ||
| case TASK: | ||
| onTaskUpdate(update.getTask()); | ||
| break; | ||
| case MEMORY: | ||
| onMemoryUpdate(update.getMemory()); | ||
| break; | ||
| default: | ||
| // Ignore. | ||
| } | ||
| }); | ||
| } | ||
|
|
||
| private void onTaskUpdate(Service.TaskUpdate update) { | ||
| String summary; | ||
| synchronized (this) { | ||
| switch(update.getStatus()) { | ||
| case STARTING: | ||
| Task parent = tasks.getOrDefault(update.getParent(), root); | ||
| Task child = new Task(update, parent); | ||
| tasks.put(update.getId(), child); | ||
| parent.addChild(child); | ||
| break; | ||
| case FINISHED: | ||
| tasks.getOrDefault(update.getId(), root).remove(); | ||
| break; | ||
| case PROGRESS: | ||
| tasks.getOrDefault(update.getId(), root).setProgress(update.getCompletePercent()); | ||
| break; | ||
| case BLOCKED: | ||
| tasks.getOrDefault(update.getId(), root).setBlocked(true); | ||
| break; | ||
| case UNBLOCKED: | ||
| tasks.getOrDefault(update.getId(), root).setBlocked(false); | ||
| break; | ||
| default: | ||
| // Ignore. | ||
| return; | ||
| } | ||
|
|
||
| summary = root.getFirstChild(Task.State.RUNNING).getStatusLabel(); | ||
| if (shownSummary.equals(summary)) { | ||
| return; | ||
| } | ||
| shownSummary = summary; | ||
| } | ||
|
|
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| listener.onStatus(summary); | ||
| } | ||
|
|
||
| private void onMemoryUpdate(Service.MemoryStatus update) { | ||
| listener.onHeap(update.getTotalHeap()); | ||
| } | ||
|
|
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| public static interface Listener { | ||
| public void onStatus(String status); | ||
| public void onHeap(long heap); | ||
| } | ||
|
|
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| private static class Task { | ||
| private final long id; | ||
| private final Task parent; | ||
| private final String name; | ||
| private final LinkedHashMap<Long, Task> children = Maps.newLinkedHashMap(); | ||
| private State state; | ||
| private int progress; | ||
|
|
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| public Task(long id, Task parent, String name, State state, int progress) { | ||
| this.id = id; | ||
| this.parent = parent; | ||
| this.name = name; | ||
| this.state = state; | ||
| this.progress = progress; | ||
| } | ||
|
|
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| public Task(Service.TaskUpdate update, Task parent) { | ||
| this(update.getId(), parent, update.getName(), getState(update), update.getCompletePercent()); | ||
| } | ||
|
|
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| private static State getState(Service.TaskUpdate update) { | ||
| return (update.getBackground()) ? State.BACKGROUND : State.RUNNING; | ||
| } | ||
|
|
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| public static Task newRoot() { | ||
| return new Task(-1, null, null, null, 0) { | ||
| @Override | ||
| public void setBlocked(boolean newVal) { | ||
| // Don't do anything. | ||
| } | ||
|
|
||
| @Override | ||
| public void remove() { | ||
| // Don't do anything. | ||
| } | ||
|
|
||
| @Override | ||
| public String getLabel() { | ||
| return ""; | ||
| } | ||
| }; | ||
| } | ||
|
|
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| public void setBlocked(boolean blocked){ | ||
| if (state != State.BACKGROUND) { | ||
| state = blocked ? State.BLOCKED: State.RUNNING; | ||
| parent.setBlocked(blocked); | ||
| } | ||
| } | ||
|
|
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| public void setProgress(int progress) { | ||
| this.progress = progress; | ||
| } | ||
|
|
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| public void addChild(Task child) { | ||
| children.put(child.id, child); | ||
| } | ||
|
|
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| public void remove() { | ||
| parent.children.remove(id); | ||
| } | ||
|
|
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| public Task getFirstChild(State inState) { | ||
| for (Task child : children.values()) { | ||
| if (child.state == inState) { | ||
| return child; | ||
| } | ||
| } | ||
| return this; | ||
| } | ||
|
|
||
| public Task getLeftMostDecendant(State inState) { | ||
| for (Task child : children.values()) { | ||
| if (child.state == inState) { | ||
| return child.getLeftMostDecendant(inState); | ||
| } | ||
| } | ||
| return this; | ||
| } | ||
|
|
||
| public String getLabel() { | ||
| return (progress == 0) ? name : name + "<" + progress + "%>"; | ||
| } | ||
|
|
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| public String getStatusLabel() { | ||
| Task leaf = getLeftMostDecendant(State.RUNNING); | ||
| if (leaf == this) { | ||
| return getLabel(); | ||
| } else { | ||
| return getLabel() + " ... " + leaf.getLabel(); | ||
| } | ||
| } | ||
|
|
||
| private static enum State { | ||
| BACKGROUND, RUNNING, BLOCKED, | ||
| } | ||
| } | ||
| } |
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