I'm working on a volley POST call from an Android java app that will work onboard a ship where communications are not very good, so there are many fails.
The data are sent every 5 minutes to a requestqueue that can accumulate many requests, some of them will fail.
I pretend to configure the jsonObjectRequest to insert the failed data into a local database to be synchronize again when ship arrives on port.
My question is if there is a way to configure jsonObjectRequest for obtain failed jsonrequest to be executed when an error response is received or when requestqueue produces a timeout?
My code
public void sincronizar_servidor_fast() {
String postUrl = "";
JSONObject json_to_add=new JSONObject();
try{
json_to_add.put("datos",datos_array);
System.out.println("json_to_add");
}catch (JSONException e){}
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST, postUrl, json_to_add, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
System.out.println(response);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
}
});
jsonObjectRequest.setRetryPolicy(new DefaultRetryPolicy(
(int) TimeUnit.SECONDS.toMillis(180), -1, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
requestQueue.add(jsonObjectRequest);
if (register_ddbb1) {
if (db != null) {
db.execSQL("");
}
}
}
Related
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.
this question is asked very often, but all the answers 2 or 3 years old. I have a login for my Android app and the date is saved in a MySQL database on my cloud server which has a SSL certificate.
When I test my app on my local machine everything is fine, but when I try to connect with my cloud server I get the message "Trust Anchor for Certification path not found". My credentials are ok.
I know that I have to set a sslSocketFactory. I tried so many, but one worked. I´m sitting now for days. May someone had a idea how to solve
here my code without sslSocketFactory
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.logintest, container, false);
btn_login = view.findViewById(R.id.btn_logintest);
email = view.findViewById(R.id.etEmail);
password = view.findViewById(R.id.etPassword);
btn_login.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
login();
}
public void login() {
str_email = email.getText().toString();
str_password = password.getText().toString();
if(!str_email.equals("") && !str_password.equals("")) {
StringRequest request = new StringRequest(Request.Method.POST, URL_LOGIN, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction= fragmentManager.beginTransaction();
DummyFragment dummyFragment = new DummyFragment();
fragmentTransaction.replace(R.id.container,dummyFragment);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
Log.e("Text: ", response);
Toast.makeText(getActivity(), "erfolgreicher Text: " +response, Toast.LENGTH_LONG).show();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getActivity(), "Text: " +error.getMessage().toString(), Toast.LENGTH_SHORT).show();
}
}
) {
#Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> params = new HashMap<>();
params.put("str_email", email.getText().toString());
params.put("str_password", password.getText().toString());
return params;
}
#Override
public Map<String, String> getHeaders() throws AuthFailureError {
try {
HashMap<String, String> headers = new HashMap<>();
String credentials = "xxxxxxxxx:xxxxxxxxxx";
String auth = "Basic "
+ Base64.encodeToString(credentials.getBytes(), Base64.NO_WRAP);
headers.put("Content-Type", "application/json");
headers.put("Authorization", auth);
return headers;
} catch (Exception e) {
Log.e(TAG, "Authentication failure");
Toast.makeText(getActivity(), "" +e, Toast.LENGTH_LONG).show();
}
return super.getHeaders();
}
};
RequestQueue requestQueue = Volley.newRequestQueue(getActivity().getApplicationContext());
requestQueue.add(request);
}
else {
if (email.getText().toString().equals("")) {
Toast.makeText(getActivity(), "Bitte Email Adresse eingeben", Toast.LENGTH_SHORT).show();
} else if (password.getText().toString().equals("")) {
Toast.makeText(getActivity(), "Bitte Passwort eingeben", Toast.LENGTH_SHORT).show();
}
}
}
});
return view;
}
}
I tried the code from android developer page, but some error. I tried to set network_security.xml but it didn't worked for me. When I test my credentials with postman I get response 200.
I'm using this library(https://github.com/rdavisau/sockets-for-pcl) to communicate with a TCP Server, that sends me when a event was generated, then, I have to verify all the time if the TCP Server sent to me a event, but if I try read anything before the TCP Server sends me, it's thrown the UnhandledException, but it only happens if I read inside a Task, in the main thread it thrown a timeout exception, the exception that I expected to happen in Task.
Someone can help me? Thanks. below is my code.
public class CentralTcpService
{
#region ConnectTcpAsync
public async void ConnectTcpAsync()
{
try
{
_sockecClient = new TcpSocketClient();
await _sockecClient.ConnectAsync(Central.Ip, Central.Port);
_writter = new ExtendedBinaryWriter(_sockecClient.WriteStream);
_reader = new ExtendedBinaryReader(_sockecClient.ReadStream);
_writter.WriteString(EvenNotProtocol.MobileReceiverCommand);
_sockecClient.ReadStream.ReadTimeout = int.MaxValue;
EnableTcpService();
}
catch (Exception e)
{
throw new Exception(e.Message);
}
}
#endregion
#region TcpService
private void EnableTcpService()
{
_cancelationTcpService = new CancellationTokenSource();
new Task(StartService, _cancelationTcpService.Token, TaskCreationOptions.LongRunning).Start();
}
private void StartService()
{
while (!_cancelationTcpService.Token.IsCancellationRequested)
{
var ev = EvenNotProtocol.DeserializeEvent(_reader);
if (ev == null) continue;
_writter.WriteString(EvenNotProtocol.MobileOkCommand);
EventReceived?.Invoke(this, new CentralTcpEventArgs(ev));
}
}
}
public class EvenNotProtocol
{
public static Event DeserializeEvent(ExtendedBinaryReader reader)
{
try
{
reader.SkipBytes(1);
.....
}
catch (IOException e)
{
return null;
}
}
}
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.
In my app I m sending 3 parameters to server latitude,longitude and image.Earlier i was using volley for sending the parameter, but since i have a image also I had to use Multipart in my code.But i m getting an error while uploadind. In the notification bar the uploading starts but after some times it says error in uploading
Below is the code for MultiPart:
public void send() {
try {
String uploadId = UUID.randomUUID().toString();
//Creating a multi part request
new MultipartUploadRequest(this, uploadId, REGISTER_URL)
.setMethod("POST")
.addParameter("action", "location")
.addFileToUpload(imagePath, "data")//Adding file
//.addParameter("name", name) //Adding text parameter to the request
.setNotificationConfig(new UploadNotificationConfig())
.setMaxRetries(5)
.startUpload(); //Starting the upload
} catch (Exception exc) {
Toast.makeText(this, exc.getMessage(), Toast.LENGTH_SHORT).show();
}
}
Below is my volley code:
final String latitudee = String.valueOf(latitude);
final String longitudee =String.valueOf(longitude);
final String datae = imagePath;
//getting the actual path of the image
StringRequest stringRequest = new StringRequest(Request.Method.POST, URL,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
Toast.makeText(MapsActivity.this,response,Toast.LENGTH_LONG).show();
System.out.println(response);
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(MapsActivity.this,error.toString(),Toast.LENGTH_LONG).show();
}
}){
#Override
protected Map<String,String> getParams(){
Map<String,String> params = new HashMap<String, String>();
params.put("action","location");
params.put("latitude",latitudee);
params.put("longitude",longitudee);
send();
// params.put("data", datae);
//Uploading code
return params;}
};
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
Please help me where I'm going wrong
You can send your others parameters through Multipart request library too. just add "add parameter" to send more parameters.