Catch Elasticsearch bulk errors when using bulkProcessor - elasticsearch

I use bulkProcessor to insert/update bulks in ElasticSearch.
I would like to catch
EsRejectedExecutionException
VersionConflictEngineException
DocumentAlreadyExistsException
but it doesn't throw anything.
It only set a message on the response item.
How can I handle it properly? e.g. applicative retry if rejected...
public BulkResponse response bulkUpdate(.....) {
BulkResponse bulkWriteResult = null;
long startTime = System.currentTimeMillis();
AtomicInteger amountOfRequests = new AtomicInteger();
long esTime;
ElasticBulkProcessorListener listener = new ElasticBulkProcessorListener(updateOperations);
BulkProcessor bulkProcessor = BulkProcessor.builder(client, listener)
.setBulkActions(MAX_BULK_ACTIONS)
.setBulkSize(new ByteSizeValue(maxBulkSize, ByteSizeUnit.MB))
.setConcurrentRequests(5)
.build();
updateOperations.forEach(updateRequest -> {
bulkProcessor.add(updateRequest);
amountOfRequests.getAndIncrement();
});
try {
boolean isFinished = bulkProcessor.awaitClose(bulkTimeout, TimeUnit.SECONDS);
if (isFinished) {
if (listener.getBulkWriteResult() != null) {
bulkWriteResult = listener.getBulkWriteResult();
} else {
throw new Exception("Bulk updating failed, results are empty");
}
} else {
throw new Exception("Bulk updating failed, received timeout");
}
} catch (InterruptedException e) {
e.printStackTrace();
}
return bulkWriteResult;
}
public class ElasticBulkProcessorListener implements BulkProcessor.Listener {
private long esTime = 0;
private List<Throwable> errors;
private BulkResponse response;
public long getEsTime() {
return esTime;
}
#Override
public void beforeBulk(long executionId, BulkRequest request) {
String description = "";
if (!request.requests().isEmpty()) {
ActionRequest request1 = request.requests().get(0);
description = ((UpdateRequest) request1).type();
}
log.info("Bulk executionID: {}, estimated size is: {}MB, number of actions: {}, request type: {}",
executionId, (request.estimatedSizeInBytes() / 1000000), request.numberOfActions(), description);
}
#Override
public void afterBulk(long executionId, BulkRequest request, BulkResponse response) {
log.info("Bulk executionID: {}, took : {} Millis, bulk size: {}", executionId, response.getTookInMillis(), response.getItems().length);
esTime = response.getTookInMillis();
response = createBulkUpdateResult(response);
}
#Override
public void afterBulk(long executionId, BulkRequest request, Throwable failure) {
log.error("Bulk , failed! error: ", executionId, failure);
throw new DataFWCoreException(String.format("Bulk executionID: %d, update operation failed", executionId), failure);
}
}

The failure handler will be called only when network failure occurred,
Any other case will get success handler.
The only way to handle exception as I mention above is by parse each response item and figure out what happened.

Related

Can I change Netty pipeline by events?

My app should do the next:
Send a POST request to server to get the token.
Connect to the websocket using this token in the headers while handshake.
Short question: To activate WebSocketClientProtocolHandler I have to fire event ctx.fireChannelActive() but from channelRead method because in this method I receive token from server . Is it correct place?
I implemented custom ChannelInboundHandlerAdapter and override:
#Override
public void channelActive(ChannelHandlerContext ctx) throws Exception {
super.channelActive(ctx);
authenticator.authenticate(ctx.channel()).addListener(new ChannelFutureListener() {
#Override
public void operationComplete(ChannelFuture channelFuture) throws Exception {
if (!channelFuture.isSuccess()) {
authPromise.tryFailure(channelFuture.cause());
ctx.fireExceptionCaught(new RuntimeException("Auth is failed."));
} else {
ctx.fireUserEventTriggered("Auth is successful");
}
}
});
}
#Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
if (!(msg instanceof FullHttpResponse)) {
ctx.fireChannelRead(msg);
}
FullHttpResponse response = (FullHttpResponse) msg;
try {
authenticator.finishAuthentication(ctx.channel(), response);
authPromise.trySuccess();
ctx.pipeline().remove(this);
ctx.fireChannelActive();
} finally {
response.release();
}
}
Authenticator class adds needed handlers, sends POST request and then it should parse response from server and change the pipeline.
public class Authenticator {
private final Logger LOGGER = LoggerFactory.getLogger(this.getClass());
private final ObjectMapper mapper = new ObjectMapper();
private final MessengerConfig messengerConfig;
public Authenticator(MessengerConfig messengerConfig) {
this.messengerConfig = messengerConfig;
}
public ChannelFuture authenticate(Channel channel) {
this.preCheck(channel);
return this.authenticate(channel, channel.newPromise());
}
private void preCheck(Channel channel) {
ChannelPipeline pipeline = channel.pipeline();
HttpClientCodec httpClientCodec = pipeline.get(HttpClientCodec.class);
if (httpClientCodec == null) {
LOGGER.warn("Pipeline does not contain HttpClientCodec.");
pipeline.addFirst(HttpClientCodec.class.getName(), new HttpClientCodec());
LOGGER.info("HttpClientCodec was added to pipeline.");
}
HttpObjectAggregator httpObjectAggregator = pipeline.get(HttpObjectAggregator.class);
if (httpObjectAggregator == null) {
LOGGER.warn("Pipeline does not contain HttpObjectAggregator.");
pipeline.addAfter(
HttpClientCodec.class.getName(),
HttpObjectAggregator.class.getName(),
new HttpObjectAggregator(8192)
);
LOGGER.info("HttpObjectAggregator was added to pipeline.");
}
}
private ChannelFuture authenticate(Channel channel, ChannelPromise promise) {
HttpRequest request = createAuthRequest();
try {
channel.writeAndFlush(request).addListener(new ChannelFutureListener() {
#Override
public void operationComplete(ChannelFuture channelFuture) throws Exception {
if (channelFuture.isSuccess()) {
promise.setSuccess();
} else {
promise.setFailure(new RuntimeException(""));
}
}
});
} catch (Exception e) {
LOGGER.error("Error", e);
}
return promise;
}
public void finishAuthentication(Channel channel, FullHttpResponse response) {
ByteBuf content = response.content();
AuthenticationData authenticationData = null;
try {
authenticationData = this.mapper.readValue(content.toString(CharsetUtil.UTF_8), AuthenticationData.class);
} catch (JsonProcessingException e) {
LOGGER.error("Can't parse authentication data.", e);
throw new RuntimeException((e));
}
LOGGER.info(Objects.toString(authenticationData));
DefaultWebSocketClientProtocolHandlerFactory factory = new DefaultWebSocketClientProtocolHandlerFactory();
WebSocketClientProtocolHandler handler = factory.getHandler(this.messengerConfig, authenticationData);
ChannelPipeline pipeline = channel.pipeline();
pipeline.addLast(WebSocketClientProtocolHandler.class.getName(), handler);
LOGGER.info("WebSocketClientProtocolHandler was added.");
pipeline.addLast(MessageHandler.class.getName(), new MessageHandler());
LOGGER.info("MessageHandler was added.");
}
So here I have two stages:
Auth stage with a pipeline:
io.netty.handler.codec.http.HttpClientCodec
io.netty.handler.codec.http.HttpObjectAggregator
AuthenticationHandler
2 Web-socket stage with a pipeline:
io.netty.handler.codec.http.HttpClientCodec
io.netty.handler.codec.http.HttpObjectAggregator
io.netty.handler.codec.http.websocketx.WebSocketClientProtocolHandshakeHandler
io.netty.handler.codec.http.websocketx.Utf8FrameValidator
io.netty.handler.codec.http.websocketx.WebSocketClientProtocolHandler
com.github.apsyvenko.client.messaging.MessageHandler
To activate second stage I have to fire event - ctx.fireChannelActive() but from channelRead.
As a result I got an exception:
18:19:37.055 [nioEventLoopGroup-2-1] WARN i.n.channel.DefaultChannelPipeline - An exceptionCaught() event was fired, and it reached at the tail of the pipeline. It usually means the last handler in the pipeline did not handle the exception.
java.net.SocketException: Connection reset
after hand-shake had started.

Not getting response for query in flink queryable state [version-1.7.2]

I am querying to proxy server of flink cluster which is on 127.0.1.1:9069 but not getting response for query. I am calculating sum of all inputted numbers by creating a server on 9000 port. Also I am storing the sum in Value State.
Flink Job:
private transient ValueState<Tuple2<String, Long>> sum;
#Override
public void flatMap(Tuple2<Long, Long> input, Collector<Tuple2<String,Long>> out) throws Exception {
if (input.f1==-1){
sum.clear();
return;
}
Tuple2<String, Long> currentSum = sum.value();
currentSum.f1 += input.f1;
sum.update(currentSum);
System.out.println("Current Sum: "+(sum.value().f1)+"\nCurrent Count: "+(sum.value().f0));
out.collect(new Tuple2<>("sum", sum.value().f1));
}
#Override
public void open(Configuration config) {
ValueStateDescriptor<Tuple2<String, Long>> descriptor =
new ValueStateDescriptor<>(
"sum", // the state name
TypeInformation.of(new TypeHint<Tuple2<String, Long>>() {}),
Tuple2.of("sum", 0L)); // default value of the state, if nothing was set
sum = getRuntimeContext().getState(descriptor);
}
inp.flatMap(new FlatMapFunction<String, Tuple2<Long, Long>>() {
#Override
public void flatMap(String inpstr, Collector<Tuple2<Long, Long>> out) throws Exception{
for (String word : inpstr.split("\\s")) {
try {
if(word.equals("quit")){
throw new QuitValueState( "Stoppping!!!",hostname,port);
}
if(word.equals("clear")){
word="-1";
}
out.collect(Tuple2.of(1L, Long.valueOf(word)));
}
catch ( NumberFormatException e) {
System.out.println("Enter valid number: "+e.getMessage());
}catch (QuitValueState ex){
System.out.println("Quitting!!!");
}
}
}
}).keyBy(0).flatMap(new StreamingJob())
.keyBy(0).asQueryableState("query-name");
On flink cluster I am able to see proxy server at 127.0.1.1:9069
Client side:
public static void main(String[] args) throws IOException, InterruptedException, Exception {
QueryableStateClient client = new QueryableStateClient("127.0.1.1", 9069);
System.out.println("Querying on "+args[0]);
JobID jobId = JobID.fromHexString(args[0]);
ValueStateDescriptor<Tuple2<String, Long>> descriptor =
new ValueStateDescriptor<>(
"sum",
TypeInformation.of(new TypeHint<Tuple2<String, Long>>() {
}));
CompletableFuture<ValueState<Tuple2<String, Long>>> resultFuture =
client.getKvState(jobId, "query-name", "sum", BasicTypeInfo.STRING_TYPE_INFO, descriptor);
System.out.println(resultFuture);
resultFuture.thenAccept(response -> {
try {
Tuple2<String, Long> res = response.value();
System.out.println("Queried sum value: " + res);
} catch (Exception e) {
e.printStackTrace();
}
System.out.println("Exiting future ...");
});
}

How to use Netty's channel pool map as a ConnectorProvider for a Jax RS client

I have wasted several hours trying to solve a issue with the use of netty's channel pool map and a jax rs client.
I have used jersey's own netty connector as an inspiration but exchanged netty's channel with netty's channel pool map.
https://jersey.github.io/apidocs/2.27/jersey/org/glassfish/jersey/netty/connector/NettyConnectorProvider.html
My problem is that I have references that I need inside my custom SimpleChannelInboundHandler. However by the design of netty's way to create a channel pool map, I can not pass the references through my custom ChannelPoolHandler, because as soon as the pool map has created a pool the constructor of the channel pool handler never runs again.
This is the method where it makes acquires a pool and check out a channel to make a HTTP request.
#Override
public Future<?> apply(ClientRequest request, AsyncConnectorCallback callback) {
final CompletableFuture<Object> completableFuture = new CompletableFuture<>();
try{
HttpRequest httpRequest = buildHttpRequest(request);
// guard against prematurely closed channel
final GenericFutureListener<io.netty.util.concurrent.Future<? super Void>> closeListener =
future -> {
if (!completableFuture.isDone()) {
completableFuture.completeExceptionally(new IOException("Channel closed."));
}
};
try {
ClientRequestDTO clientRequestDTO = new ClientRequestDTO(NettyChannelPoolConnector.this, request, completableFuture, callback);
dtoMap.putIfAbsent(request.getUri(), clientRequestDTO);
// Retrieves a channel pool for the given host
FixedChannelPool pool = this.poolMap.get(clientRequestDTO);
// Acquire a new channel from the pool
io.netty.util.concurrent.Future<Channel> f = pool.acquire();
f.addListener((FutureListener<Channel>) futureWrite -> {
//Succeeded with acquiring a channel
if (futureWrite.isSuccess()) {
Channel channel = futureWrite.getNow();
channel.closeFuture().addListener(closeListener);
try {
if(request.hasEntity()) {
channel.writeAndFlush(httpRequest);
final JerseyChunkedInput jerseyChunkedInput = new JerseyChunkedInput(channel);
request.setStreamProvider(contentLength -> jerseyChunkedInput);
if(HttpUtil.isTransferEncodingChunked(httpRequest)) {
channel.write(jerseyChunkedInput);
} else {
channel.write(jerseyChunkedInput);
}
executorService.execute(() -> {
channel.closeFuture().removeListener(closeListener);
try {
request.writeEntity();
} catch (IOException ex) {
callback.failure(ex);
completableFuture.completeExceptionally(ex);
}
});
channel.flush();
} else {
channel.closeFuture().removeListener(closeListener);
channel.writeAndFlush(httpRequest);
}
} catch (Exception ex) {
System.err.println("Failed to sync and flush http request" + ex.getLocalizedMessage());
}
pool.release(channel);
}
});
} catch (NullPointerException ex) {
System.err.println("Failed to acquire socket from pool " + ex.getLocalizedMessage());
}
} catch (Exception ex) {
completableFuture.completeExceptionally(ex);
return completableFuture;
}
return completableFuture;
}
This is my ChannelPoolHandler
public class SimpleChannelPoolHandler implements ChannelPoolHandler {
private ClientRequestDTO clientRequestDTO;
private boolean ssl;
private URI uri;
private int port;
SimpleChannelPoolHandler(URI uri) {
this.uri = uri;
if(uri != null) {
this.port = uri.getPort() != -1 ? uri.getPort() : "https".equals(uri.getScheme()) ? 443 : 80;
ssl = "https".equalsIgnoreCase(uri.getScheme());
}
}
#Override
public void channelReleased(Channel ch) throws Exception {
System.out.println("Channel released: " + ch.toString());
}
#Override
public void channelAcquired(Channel ch) throws Exception {
System.out.println("Channel acquired: " + ch.toString());
}
#Override
public void channelCreated(Channel ch) throws Exception {
System.out.println("Channel created: " + ch.toString());
int readTimeout = Integer.parseInt(ApplicationEnvironment.getInstance().get("READ_TIMEOUT"));
SocketChannelConfig channelConfig = (SocketChannelConfig) ch.config();
channelConfig.setConnectTimeoutMillis(2000);
ChannelPipeline channelPipeline = ch.pipeline();
if(ssl) {
SslContext sslContext = SslContextBuilder.forClient().trustManager(InsecureTrustManagerFactory.INSTANCE).build();
channelPipeline.addLast("ssl", sslContext.newHandler(ch.alloc(), uri.getHost(), this.port));
}
channelPipeline.addLast("client codec", new HttpClientCodec());
channelPipeline.addLast("chunked content writer",new ChunkedWriteHandler());
channelPipeline.addLast("content decompressor", new HttpContentDecompressor());
channelPipeline.addLast("read timeout", new ReadTimeoutHandler(readTimeout, TimeUnit.MILLISECONDS));
channelPipeline.addLast("business logic", new JerseyNettyClientHandler(this.uri));
}
}
And this is my SimpleInboundHandler
public class JerseyNettyClientHandler extends SimpleChannelInboundHandler<HttpObject> {
private final NettyChannelPoolConnector nettyChannelPoolConnector;
private final LinkedBlockingDeque<InputStream> isList = new LinkedBlockingDeque<>();
private final AsyncConnectorCallback asyncConnectorCallback;
private final ClientRequest jerseyRequest;
private final CompletableFuture future;
public JerseyNettyClientHandler(ClientRequestDto clientRequestDTO) {
this.nettyChannelPoolConnector = clientRequestDTO.getNettyChannelPoolConnector();
ClientRequestDTO cdto = clientRequestDTO.getNettyChannelPoolConnector().getDtoMap().get(clientRequestDTO.getClientRequest());
this.asyncConnectorCallback = cdto.getCallback();
this.jerseyRequest = cdto.getClientRequest();
this.future = cdto.getFuture();
}
#Override
protected void channelRead0(ChannelHandlerContext ctx, HttpObject msg) throws Exception {
if(msg instanceof HttpResponse) {
final HttpResponse httpResponse = (HttpResponse) msg;
final ClientResponse response = new ClientResponse(new Response.StatusType() {
#Override
public int getStatusCode() {
return httpResponse.status().code();
}
#Override
public Response.Status.Family getFamily() {
return Response.Status.Family.familyOf(httpResponse.status().code());
}
#Override
public String getReasonPhrase() {
return httpResponse.status().reasonPhrase();
}
}, jerseyRequest);
for (Map.Entry<String, String> entry : httpResponse.headers().entries()) {
response.getHeaders().add(entry.getKey(), entry.getValue());
}
if((httpResponse.headers().contains(HttpHeaderNames.CONTENT_LENGTH) && HttpUtil.getContentLength(httpResponse) > 0) || HttpUtil.isTransferEncodingChunked(httpResponse)) {
ctx.channel().closeFuture().addListener(future -> isList.add(NettyInputStream.END_OF_INPUT_ERROR));
response.setEntityStream(new NettyInputStream(isList));
} else {
response.setEntityStream(new InputStream() {
#Override
public int read() {
return -1;
}
});
}
if(asyncConnectorCallback != null) {
nettyChannelPoolConnector.executorService.execute(() -> {
asyncConnectorCallback.response(response);
future.complete(response);
});
}
}
if(msg instanceof HttpContent) {
HttpContent content = (HttpContent) msg;
ByteBuf byteContent = content.content();
if(byteContent.isReadable()) {
byte[] bytes = new byte[byteContent.readableBytes()];
byteContent.getBytes(byteContent.readerIndex(), bytes);
isList.add(new ByteArrayInputStream(bytes));
}
}
if(msg instanceof LastHttpContent) {
isList.add(NettyInputStream.END_OF_INPUT);
}
}
#Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
if(asyncConnectorCallback != null) {
nettyChannelPoolConnector.executorService.execute(() -> asyncConnectorCallback.failure(cause));
}
future.completeExceptionally(cause);
isList.add(NettyInputStream.END_OF_INPUT_ERROR);
}
The references needed to be passed to the SimpleChannelInboundHandler is what is packed into the ClientRequestDTO as seen in the first code block.
I am not sure as it is not a tested code. But it could be achieved by the following code.
SimpleChannelPool sPool = poolMap.get(Req.getAddress());
Future<Channel> f = sPool.acquire();
f.get().pipeline().addLast("inbound", new NettyClientInBoundHandler(Req, jbContext, ReportData));
f.addListener(new NettyClientFutureListener(this.Req, sPool));
where Req, jbContext, ReportData could be input data for InboundHandler().

Subscribers onnext does not contain complete item

We are working with project reactor and having a huge problem right now. This is how we produce (publish our data):
public Flux<String> getAllFlux() {
return Flux.<String>create(sink -> {
new Thread(){
public void run(){
Iterator<Cache.Entry<String, MyObject>> iterator = getAllIterator();
ObjectMapper mapper = new ObjectMapper();
while(iterator.hasNext()) {
try {
sink.next(mapper.writeValueAsString(iterator.next().getValue()));
} catch (IOException e) {
e.printStackTrace();
}
}
sink.complete();
}
} .start();
});
}
As you can see we are taking data from an iterator and are publishing each item in that iterator as a json string. Our subscriber does the following:
flux.subscribe(new Subscriber<String>() {
private Subscription s;
int amount = 1; // the amount of received flux payload at a time
int onNextAmount;
String completeItem="";
ObjectMapper mapper = new ObjectMapper();
#Override
public void onSubscribe(Subscription s) {
System.out.println("subscribe");
this.s = s;
this.s.request(amount);
}
#Override
public void onNext(String item) {
MyObject myObject = null;
try {
System.out.println(item);
myObject = mapper.readValue(completeItem, MyObject.class);
System.out.println(myObject.toString());
} catch (IOException e) {
System.out.println(item);
System.out.println("failed: " + e.getLocalizedMessage());
}
onNextAmount++;
if (onNextAmount % amount == 0) {
this.s.request(amount);
}
}
#Override
public void onError(Throwable t) {
System.out.println(t.getLocalizedMessage())
}
#Override
public void onComplete() {
System.out.println("completed");
});
}
As you can see we are simply printing the String item which we receive and parsing it into an object using jackson wrapper. The problem we got now is that for most of our items everything works fine:
{"itemId": "someId", "itemDesc", "some description"}
But for some items the String is cut off like this for example:
{"itemId": "some"
And the next item after that would be
"Id", "itemDesc", "some description"}
There is no pattern for those cuts. It is completely random and it is different everytime we run that code. Ofcourse our jackson is gettin an error Unexpected end of Input with that behaviour.
So what is causing such a behaviour and how can we solve it?
Solution:
Send the Object inside the flux instead of the String:
public Flux<ItemIgnite> getAllFlux() {
return Flux.create(sink -> {
new Thread(){
public void run(){
Iterator<Cache.Entry<String, ItemIgnite>> iterator = getAllIterator();
while(iterator.hasNext()) {
sink.next(iterator.next().getValue());
}
}
} .start();
});
}
and use the following produces type:
#RequestMapping(value="/allFlux", method=RequestMethod.GET, produces="application/stream+json")
The key here is to use stream+json and not only json.

android volley JsonArrayRequest return nothing

in the below code my arrayList will be empty after JsonArrayRequest block.
I set break point at this line: "int size = arrayList.size();"
every thing is OK until "while" loop finishes. after that allayList is empty.
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Request.Method.GET, json_url,(String) null,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
int count=0;
int responseLength = response.length();
responseLength--;
while (count<responseLength)
{
try {
JSONObject jsonObject = response.getJSONObject(count);
Contact contact = new Contact(jsonObject.getString("title"),
jsonObject.getString("email"),
jsonObject.getString("description"),
jsonObject.getString("date"),
jsonObject.getBoolean("status"));
arrayList.add(contact);
int size = arrayList.size();
count++;
} catch (JSONException e) {
e.printStackTrace();
}
}
int size = arrayList.size();
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(context,"Error....",Toast.LENGTH_SHORT).show();
error.printStackTrace();
}
}
);
int size = arrayList.size();
VolleySingleton.getmInstance(context).addToRequestQueue(jsonArrayRequest);
return arrayList;
I will show what i did using CallBack interface:
in onCreate() method:
recyclerView = (RecyclerView) findViewById(R.id.recyclerview);
recyclerView.setHasFixedSize(true);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(linearLayoutManager);
BackgroundTask backgroundTask = new BackgroundTask(this);
backgroundTask.getContacts(new BackgroundTask.arrayListCallBack() {
#Override
public void onSuccess(ArrayList<Contact> contacts) {
RecyclerView.Adapter adapter = new RecyclerAdapter(MainActivity.this, contacts);
recyclerView.setAdapter(adapter);
}
#Override
public void onFail(String error) {
Toast.makeText(MainActivity.this, error, Toast.LENGTH_LONG).show();
}
});
and in the BackgroundTask class:
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Request.Method.POST, server_url, new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
int count = 0;
while (count < response.length()) {
try {
JSONObject jsonObject = response.getJSONObject(count);
Contact contact = new Contact(jsonObject.getString("name"), jsonObject.getString("section"));
contacts.add(contact);
Log.d("process request", "....."+jsonObject.getString("name"));
count++;
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(context, e.getMessage()+"\nError in Response", Toast.LENGTH_LONG).show();
}
callBack.onSuccess(contacts);
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
Toast.makeText(context, error.getMessage()+"\nError in Connection", Toast.LENGTH_LONG).show();
callBack.onFail("There's error ...");
}
});
MySingleton.getInstance(context).addToRequestQueue(jsonArrayRequest);
}
public interface arrayListCallBack {
void onSuccess(ArrayList<Contact> contacts);
void onFail(String error);
}

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