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Merge "Replace Handler with Executor for async DNS API"

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am: 21be4d297c

Change-Id: I5fb0d659d27894ca9f243654f9283764f1369745
This commit is contained in:
Luke Huang
2019-03-18 23:05:15 -07:00
committed by android-build-merger
parent 5f80d53df8 21be4d297c
commit 699127bae2
1 changed files with 31 additions and 33 deletions
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64
core/java/android/net/DnsResolver.java
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@@ -22,11 +22,11 @@ import static android.net.NetworkUtils.resNetworkSend;
import static android.os.MessageQueue.OnFileDescriptorEventListener.EVENT_ERROR;
import static android.os.MessageQueue.OnFileDescriptorEventListener.EVENT_INPUT;
import android.annotation.CallbackExecutor;
import android.annotation.IntDef;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.os.Handler;
import android.os.MessageQueue;
import android.os.Looper;
import android.system.ErrnoException;
import android.util.Log;
@@ -37,6 +37,7 @@ import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Executor;
/**
* Dns resolver class for asynchronous dns querying
@@ -182,20 +183,19 @@ public final class DnsResolver {
}
/**
* Pass in a blob and corresponding flags, get an answer back asynchronously
* through {@link AnswerCallback}.
* Send a raw DNS query.
* The answer will be provided asynchronously through the provided {@link AnswerCallback}.
*
* @param network {@link Network} specifying which network for querying.
* {@code null} for query on default network.
* @param query blob message
* @param flags flags as a combination of the FLAGS_* constants
* @param handler {@link Handler} to specify the thread
* upon which the {@link AnswerCallback} will be invoked.
* @param executor The {@link Executor} that the callback should be executed on.
* @param callback an {@link AnswerCallback} which will be called to notify the caller
* of the result of dns query.
*/
public <T> void query(@Nullable Network network, @NonNull byte[] query, @QueryFlag int flags,
@NonNull Handler handler, @NonNull AnswerCallback<T> callback) {
@NonNull @CallbackExecutor Executor executor, @NonNull AnswerCallback<T> callback) {
final FileDescriptor queryfd;
try {
queryfd = resNetworkSend((network != null
@@ -205,12 +205,12 @@ public final class DnsResolver {
return;
}
registerFDListener(handler.getLooper().getQueue(), queryfd, callback);
registerFDListener(executor, queryfd, callback);
}
/**
* Pass in a domain name and corresponding setting, get an answer back asynchronously
* through {@link AnswerCallback}.
* Send a DNS query with the specified name, class and query type.
* The answer will be provided asynchronously through the provided {@link AnswerCallback}.
*
* @param network {@link Network} specifying which network for querying.
* {@code null} for query on default network.
@@ -218,14 +218,13 @@ public final class DnsResolver {
* @param nsClass dns class as one of the CLASS_* constants
* @param nsType dns resource record (RR) type as one of the TYPE_* constants
* @param flags flags as a combination of the FLAGS_* constants
* @param handler {@link Handler} to specify the thread
* upon which the {@link AnswerCallback} will be invoked.
* @param executor The {@link Executor} that the callback should be executed on.
* @param callback an {@link AnswerCallback} which will be called to notify the caller
* of the result of dns query.
*/
public <T> void query(@Nullable Network network, @NonNull String domain,
@QueryClass int nsClass, @QueryType int nsType, @QueryFlag int flags,
@NonNull Handler handler, @NonNull AnswerCallback<T> callback) {
@NonNull @CallbackExecutor Executor executor, @NonNull AnswerCallback<T> callback) {
final FileDescriptor queryfd;
try {
queryfd = resNetworkQuery((network != null
@@ -234,33 +233,32 @@ public final class DnsResolver {
callback.onQueryException(e);
return;
}
registerFDListener(handler.getLooper().getQueue(), queryfd, callback);
registerFDListener(executor, queryfd, callback);
}
private <T> void registerFDListener(@NonNull MessageQueue queue,
private <T> void registerFDListener(@NonNull Executor executor,
@NonNull FileDescriptor queryfd, @NonNull AnswerCallback<T> answerCallback) {
queue.addOnFileDescriptorEventListener(
Looper.getMainLooper().getQueue().addOnFileDescriptorEventListener(
queryfd,
FD_EVENTS,
(fd, events) -> {
byte[] answerbuf = null;
try {
// TODO: Implement result function in Java side instead of using JNI
// Because JNI method close fd prior than unregistering fd on
// event listener.
answerbuf = resNetworkResult(fd);
} catch (ErrnoException e) {
Log.e(TAG, "resNetworkResult:" + e.toString());
answerCallback.onQueryException(e);
return 0;
}
try {
answerCallback.onAnswer(answerCallback.parser.parse(answerbuf));
} catch (ParseException e) {
answerCallback.onParseException(e);
}
executor.execute(() -> {
byte[] answerbuf = null;
try {
answerbuf = resNetworkResult(fd);
} catch (ErrnoException e) {
Log.e(TAG, "resNetworkResult:" + e.toString());
answerCallback.onQueryException(e);
return;
}
try {
answerCallback.onAnswer(
answerCallback.parser.parse(answerbuf));
} catch (ParseException e) {
answerCallback.onParseException(e);
}
});
// Unregister this fd listener
return 0;
});