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Enable command passing from clients to content apps (#19506)
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58 changes: 58 additions & 0 deletions
58
...android/App/platform-app/src/main/java/com/matter/tv/server/service/ResponseRegistry.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| package com.matter.tv.server.service; | ||
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| import android.util.Log; | ||
| import java.util.Map; | ||
| import java.util.concurrent.ConcurrentHashMap; | ||
| import java.util.concurrent.CountDownLatch; | ||
| import java.util.concurrent.TimeUnit; | ||
| import java.util.concurrent.atomic.AtomicInteger; | ||
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| public class ResponseRegistry { | ||
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| private static final String TAG = "ResponseRegistry"; | ||
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| private AtomicInteger messageCounter = new AtomicInteger(); | ||
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| private Map<Integer, String> responses = new ConcurrentHashMap<>(); | ||
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| private Map<Integer, CountDownLatch> latches = new ConcurrentHashMap<>(); | ||
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| public int getNextMessageCounter() { | ||
| int counter = messageCounter.incrementAndGet(); | ||
| // MAX_VALUE used for error scenarios | ||
| if (counter == Integer.MAX_VALUE) { | ||
| counter = messageCounter.incrementAndGet(); | ||
| } | ||
| latches.put(counter, new CountDownLatch(1)); | ||
| return counter; | ||
| } | ||
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| public void waitForMessage(int counter, long timeout, TimeUnit unit) { | ||
| CountDownLatch latch = latches.get(counter); | ||
| if (latch == null) { | ||
| return; | ||
| } | ||
| try { | ||
| if (!latch.await(timeout, unit)) { | ||
| Log.i(TAG, "Timed out while waiting for response for message " + counter); | ||
| } | ||
| } catch (InterruptedException e) { | ||
| Log.i(TAG, "Interrupted while waiting for response for message " + counter); | ||
| } | ||
| } | ||
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| public void receivedMessageResponse(int counter, String response) { | ||
| CountDownLatch latch = latches.remove(counter); | ||
| if (latch == null) { | ||
| // no point adding response to memory if no one is going to read it. | ||
| return; | ||
| } | ||
| responses.put(counter, response); | ||
| latch.countDown(); | ||
| } | ||
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| public String readAndRemoveResponse(int counter) { | ||
| // caller should manage null values | ||
| return responses.remove(counter); | ||
| } | ||
| } |
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