Http multithreaded connections with retry and session update
0
$begingroup$
I have the task to make a multithreaded http method. This method is my entry point (As mine is a library) for a bigger project which is a library. So the flow is like this
ProjectA ---> My Entry point Lib ----> HttpLibrary
The main features of this method are:
- Accept Multiple Requests
- Check for Http Status codes and act appropriately
- If session fails, try updating session once and retry main API call
Here is what I have come up with so far
private JsonHttpResult execJsonHttpMethod(final int requestId, BaseRequest request, int maxRequestCount) throws BaseApiException, NullPointerException {
if (maxRequestCount <= 0) {
maxRequestCount = REQUESTS_ATTEMPTS_COUNT;
}
int timeToWaitBeforeNextRequestIncaseError = 500;
HttpRetryManager httpRetryManager = new HttpRetryManager(maxRequestCount, timeToWaitBeforeNextRequestIncaseError); // Instance created for each thread
int count = 0; // Only for logging purpose - thread safe | thread local variable
JsonHttpResult result = null;
while (httpRetryManager.canRetry()) {
count++;
try {
reloginLock.readLock().lock();
final HttpMethod httpMethod = compileHttpMethod(request);
printRequestLog(request, "execJsonHttpMethod[request]: requestId=" + requestId + ", count=" + count + ", url=" + httpMethod.getURI(), false);
result = mTransportProvider.execJsonHttpMethod(httpMethod);
boolean isResEmpty = errorIfResponseEmpty(result);
if (isResEmpty) {
try {
httpRetryManager.onErrorUpdateCountAndSleep(new HttpStatusException(result.getHttpStatus(), "Unexpected empty response body"));
} catch (HttpStatusException responseEmpty) {
responseEmpty.printStackTrace();
throw responseEmpty;
}
}
boolean isSessionInvalid = errorIfResponseUnAuthorized(result);
if (isSessionInvalid) {
if (updateSessionIncaseApiGot401()) {
try {
//In-case session does not update, logout the user by escalating 401 to 403 ( InvalidSessionException() ---> InvalidUserException())
httpRetryManager.onErrorUpdateCountAndSleep(new InvalidUserException());
continue; //Start next iteration - no need to check for the rest of the conditions
} catch (InvalidUserException exceptionSessEsclatedToInvalidUser) {
exceptionSessEsclatedToInvalidUser.printStackTrace();
throw exceptionSessEsclatedToInvalidUser;
}
} else {
throw new InvalidUserException(); // WILL TRY ONLY ONCE - IF UPDATE FAILS LOGOUT - 403
}
}
//Logout user incase API threw 403 - Pops up the stack, no retry action required
if (errorIfResponseForbidden(result)) {
throw new InvalidUserException();
}
boolean isHttpErrCodeNotOk = errorIfHttpStatusNotOk(result);
if (!isHttpErrCodeNotOk) {
if (result.getHttpStatus() != HttpStatus.SC_OK && result.getHttpStatus() != HttpStatus.SC_CREATED
&& result.getHttpStatus() != HttpStatus.SC_NO_CONTENT) {
if (result.httpError != null) {
throw new HttpStatusDetailedException(result.getHttpStatus(), "Unexpected HTTP(S) result: " + result.toString(), result.httpError);
} else {
throw new HttpStatusException(result.getHttpStatus(), "Unexpected HTTP(S) result: " + result.toString());
}
}
}
//Success
HttpUUIDController.getInstance().handleSuccessRequest(request);
break;
} catch (TransportLevelException ex) {
printRequestLog(request, "execJsonHttpMethod[error]: request failed, requestId=" + requestId + ", count=" + count + ", ex=" + ex, false);
try {
httpRetryManager.onErrorUpdateCountAndSleep(ex);
} catch (Exception transportException) {
transportException.printStackTrace();
throw transportException;
}
} catch (URIException ex) {
printRequestLog(request, "execJsonHttpMethod[error]: request failed, ex=" + ex.getMessage(), false);
throw new InvalidUrlException();
} finally {
printRequestLog(request, "execJsonHttpMethod[result]: finished, requestId=" + requestId + ", count=" + count + ", result=" + result, false);
reloginLock.readLock().unlock();
}
}
simpleLog("Loop has been exited, Iterations: " + count);
return result;
}
These are my helper methods:
private boolean errorIfResponseEmpty(HttpResult result) {
if (result.getHttpStatus() == HttpStatus.SC_OK && result.getHttpResponse() == null) {
printResponseLog(result.getHttpStatus() + " Unexpected empty response body", true);
return true;
}
return false;
}
private boolean errorIfResponseUnAuthorized(HttpResult result) {
if (result.getHttpStatus() == HttpStatus.SC_UNAUTHORIZED) {
printResponseLog(result.getHttpStatus() + " Session Failed", true);
return true;
}
return false;
}
private boolean errorIfHttpStatusNotOk(HttpResult result) {
if (result.getHttpStatus() != HttpStatus.SC_OK && result.getHttpStatus() != HttpStatus.SC_CREATED && result.getHttpStatus() != HttpStatus.SC_NO_CONTENT) {
if (result.httpError != null) {
printResponseLog(result.getHttpStatus() + " Unexpected HTTP(S) result: " + result.toString() + " " + result.httpError, true);
} else {
printResponseLog(result.getHttpStatus() + " Unexpected HTTP(S) result: " + result.toString(), true);
}
return false;
}
return true;
}
private boolean errorIfResponseForbidden(HttpResult result) {
return (result.getHttpStatus() == HttpStatus.SC_FORBIDDEN);
}
And finally my HttpRetryManager:
private int leftRetries;
private long timeToWait;
public HttpRetryManager(int retries, long timeToWait) {
this.timeToWait = timeToWait;
leftRetries = retries;
}
public boolean canRetry() {
return leftRetries > 0;
}
public void onErrorUpdateCountAndSleep(BaseApiException ex) throws BaseApiException {
leftRetries--;
if (!canRetry()) {
throw ex;
}
waitUntilNextTry();
}
private long getTimeToWait() {
return timeToWait;
}
private void waitUntilNextTry() {
try {
Thread.sleep(getTimeToWait());
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
java multithreading error-handling api
asked 29 mins ago
User3User3
1191115
$endgroup$
add a comment |
0
$begingroup$
I have the task to make a multithreaded http method. This method is my entry point (As mine is a library) for a bigger project which is a library. So the flow is like this
ProjectA ---> My Entry point Lib ----> HttpLibrary
The main features of this method are:
- Accept Multiple Requests
- Check for Http Status codes and act appropriately
- If session fails, try updating session once and retry main API call
Here is what I have come up with so far
private JsonHttpResult execJsonHttpMethod(final int requestId, BaseRequest request, int maxRequestCount) throws BaseApiException, NullPointerException {
if (maxRequestCount <= 0) {
maxRequestCount = REQUESTS_ATTEMPTS_COUNT;
}
int timeToWaitBeforeNextRequestIncaseError = 500;
HttpRetryManager httpRetryManager = new HttpRetryManager(maxRequestCount, timeToWaitBeforeNextRequestIncaseError); // Instance created for each thread
int count = 0; // Only for logging purpose - thread safe | thread local variable
JsonHttpResult result = null;
while (httpRetryManager.canRetry()) {
count++;
try {
reloginLock.readLock().lock();
final HttpMethod httpMethod = compileHttpMethod(request);
printRequestLog(request, "execJsonHttpMethod[request]: requestId=" + requestId + ", count=" + count + ", url=" + httpMethod.getURI(), false);
result = mTransportProvider.execJsonHttpMethod(httpMethod);
boolean isResEmpty = errorIfResponseEmpty(result);
if (isResEmpty) {
try {
httpRetryManager.onErrorUpdateCountAndSleep(new HttpStatusException(result.getHttpStatus(), "Unexpected empty response body"));
} catch (HttpStatusException responseEmpty) {
responseEmpty.printStackTrace();
throw responseEmpty;
}
}
boolean isSessionInvalid = errorIfResponseUnAuthorized(result);
if (isSessionInvalid) {
if (updateSessionIncaseApiGot401()) {
try {
//In-case session does not update, logout the user by escalating 401 to 403 ( InvalidSessionException() ---> InvalidUserException())
httpRetryManager.onErrorUpdateCountAndSleep(new InvalidUserException());
continue; //Start next iteration - no need to check for the rest of the conditions
} catch (InvalidUserException exceptionSessEsclatedToInvalidUser) {
exceptionSessEsclatedToInvalidUser.printStackTrace();
throw exceptionSessEsclatedToInvalidUser;
}
} else {
throw new InvalidUserException(); // WILL TRY ONLY ONCE - IF UPDATE FAILS LOGOUT - 403
}
}
//Logout user incase API threw 403 - Pops up the stack, no retry action required
if (errorIfResponseForbidden(result)) {
throw new InvalidUserException();
}
boolean isHttpErrCodeNotOk = errorIfHttpStatusNotOk(result);
if (!isHttpErrCodeNotOk) {
if (result.getHttpStatus() != HttpStatus.SC_OK && result.getHttpStatus() != HttpStatus.SC_CREATED
&& result.getHttpStatus() != HttpStatus.SC_NO_CONTENT) {
if (result.httpError != null) {
throw new HttpStatusDetailedException(result.getHttpStatus(), "Unexpected HTTP(S) result: " + result.toString(), result.httpError);
} else {
throw new HttpStatusException(result.getHttpStatus(), "Unexpected HTTP(S) result: " + result.toString());
}
}
}
//Success
HttpUUIDController.getInstance().handleSuccessRequest(request);
break;
} catch (TransportLevelException ex) {
printRequestLog(request, "execJsonHttpMethod[error]: request failed, requestId=" + requestId + ", count=" + count + ", ex=" + ex, false);
try {
httpRetryManager.onErrorUpdateCountAndSleep(ex);
} catch (Exception transportException) {
transportException.printStackTrace();
throw transportException;
}
} catch (URIException ex) {
printRequestLog(request, "execJsonHttpMethod[error]: request failed, ex=" + ex.getMessage(), false);
throw new InvalidUrlException();
} finally {
printRequestLog(request, "execJsonHttpMethod[result]: finished, requestId=" + requestId + ", count=" + count + ", result=" + result, false);
reloginLock.readLock().unlock();
}
}
simpleLog("Loop has been exited, Iterations: " + count);
return result;
}
These are my helper methods:
private boolean errorIfResponseEmpty(HttpResult result) {
if (result.getHttpStatus() == HttpStatus.SC_OK && result.getHttpResponse() == null) {
printResponseLog(result.getHttpStatus() + " Unexpected empty response body", true);
return true;
}
return false;
}
private boolean errorIfResponseUnAuthorized(HttpResult result) {
if (result.getHttpStatus() == HttpStatus.SC_UNAUTHORIZED) {
printResponseLog(result.getHttpStatus() + " Session Failed", true);
return true;
}
return false;
}
private boolean errorIfHttpStatusNotOk(HttpResult result) {
if (result.getHttpStatus() != HttpStatus.SC_OK && result.getHttpStatus() != HttpStatus.SC_CREATED && result.getHttpStatus() != HttpStatus.SC_NO_CONTENT) {
if (result.httpError != null) {
printResponseLog(result.getHttpStatus() + " Unexpected HTTP(S) result: " + result.toString() + " " + result.httpError, true);
} else {
printResponseLog(result.getHttpStatus() + " Unexpected HTTP(S) result: " + result.toString(), true);
}
return false;
}
return true;
}
private boolean errorIfResponseForbidden(HttpResult result) {
return (result.getHttpStatus() == HttpStatus.SC_FORBIDDEN);
}
And finally my HttpRetryManager:
private int leftRetries;
private long timeToWait;
public HttpRetryManager(int retries, long timeToWait) {
this.timeToWait = timeToWait;
leftRetries = retries;
}
public boolean canRetry() {
return leftRetries > 0;
}
public void onErrorUpdateCountAndSleep(BaseApiException ex) throws BaseApiException {
leftRetries--;
if (!canRetry()) {
throw ex;
}
waitUntilNextTry();
}
private long getTimeToWait() {
return timeToWait;
}
private void waitUntilNextTry() {
try {
Thread.sleep(getTimeToWait());
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
java multithreading error-handling api
asked 29 mins ago
User3User3
1191115
$endgroup$
add a comment |
0
0
0
$begingroup$
I have the task to make a multithreaded http method. This method is my entry point (As mine is a library) for a bigger project which is a library. So the flow is like this
ProjectA ---> My Entry point Lib ----> HttpLibrary
The main features of this method are:
- Accept Multiple Requests
- Check for Http Status codes and act appropriately
- If session fails, try updating session once and retry main API call
Here is what I have come up with so far
private JsonHttpResult execJsonHttpMethod(final int requestId, BaseRequest request, int maxRequestCount) throws BaseApiException, NullPointerException {
if (maxRequestCount <= 0) {
maxRequestCount = REQUESTS_ATTEMPTS_COUNT;
}
int timeToWaitBeforeNextRequestIncaseError = 500;
HttpRetryManager httpRetryManager = new HttpRetryManager(maxRequestCount, timeToWaitBeforeNextRequestIncaseError); // Instance created for each thread
int count = 0; // Only for logging purpose - thread safe | thread local variable
JsonHttpResult result = null;
while (httpRetryManager.canRetry()) {
count++;
try {
reloginLock.readLock().lock();
final HttpMethod httpMethod = compileHttpMethod(request);
printRequestLog(request, "execJsonHttpMethod[request]: requestId=" + requestId + ", count=" + count + ", url=" + httpMethod.getURI(), false);
result = mTransportProvider.execJsonHttpMethod(httpMethod);
boolean isResEmpty = errorIfResponseEmpty(result);
if (isResEmpty) {
try {
httpRetryManager.onErrorUpdateCountAndSleep(new HttpStatusException(result.getHttpStatus(), "Unexpected empty response body"));
} catch (HttpStatusException responseEmpty) {
responseEmpty.printStackTrace();
throw responseEmpty;
}
}
boolean isSessionInvalid = errorIfResponseUnAuthorized(result);
if (isSessionInvalid) {
if (updateSessionIncaseApiGot401()) {
try {
//In-case session does not update, logout the user by escalating 401 to 403 ( InvalidSessionException() ---> InvalidUserException())
httpRetryManager.onErrorUpdateCountAndSleep(new InvalidUserException());
continue; //Start next iteration - no need to check for the rest of the conditions
} catch (InvalidUserException exceptionSessEsclatedToInvalidUser) {
exceptionSessEsclatedToInvalidUser.printStackTrace();
throw exceptionSessEsclatedToInvalidUser;
}
} else {
throw new InvalidUserException(); // WILL TRY ONLY ONCE - IF UPDATE FAILS LOGOUT - 403
}
}
//Logout user incase API threw 403 - Pops up the stack, no retry action required
if (errorIfResponseForbidden(result)) {
throw new InvalidUserException();
}
boolean isHttpErrCodeNotOk = errorIfHttpStatusNotOk(result);
if (!isHttpErrCodeNotOk) {
if (result.getHttpStatus() != HttpStatus.SC_OK && result.getHttpStatus() != HttpStatus.SC_CREATED
&& result.getHttpStatus() != HttpStatus.SC_NO_CONTENT) {
if (result.httpError != null) {
throw new HttpStatusDetailedException(result.getHttpStatus(), "Unexpected HTTP(S) result: " + result.toString(), result.httpError);
} else {
throw new HttpStatusException(result.getHttpStatus(), "Unexpected HTTP(S) result: " + result.toString());
}
}
}
//Success
HttpUUIDController.getInstance().handleSuccessRequest(request);
break;
} catch (TransportLevelException ex) {
printRequestLog(request, "execJsonHttpMethod[error]: request failed, requestId=" + requestId + ", count=" + count + ", ex=" + ex, false);
try {
httpRetryManager.onErrorUpdateCountAndSleep(ex);
} catch (Exception transportException) {
transportException.printStackTrace();
throw transportException;
}
} catch (URIException ex) {
printRequestLog(request, "execJsonHttpMethod[error]: request failed, ex=" + ex.getMessage(), false);
throw new InvalidUrlException();
} finally {
printRequestLog(request, "execJsonHttpMethod[result]: finished, requestId=" + requestId + ", count=" + count + ", result=" + result, false);
reloginLock.readLock().unlock();
}
}
simpleLog("Loop has been exited, Iterations: " + count);
return result;
}
These are my helper methods:
private boolean errorIfResponseEmpty(HttpResult result) {
if (result.getHttpStatus() == HttpStatus.SC_OK && result.getHttpResponse() == null) {
printResponseLog(result.getHttpStatus() + " Unexpected empty response body", true);
return true;
}
return false;
}
private boolean errorIfResponseUnAuthorized(HttpResult result) {
if (result.getHttpStatus() == HttpStatus.SC_UNAUTHORIZED) {
printResponseLog(result.getHttpStatus() + " Session Failed", true);
return true;
}
return false;
}
private boolean errorIfHttpStatusNotOk(HttpResult result) {
if (result.getHttpStatus() != HttpStatus.SC_OK && result.getHttpStatus() != HttpStatus.SC_CREATED && result.getHttpStatus() != HttpStatus.SC_NO_CONTENT) {
if (result.httpError != null) {
printResponseLog(result.getHttpStatus() + " Unexpected HTTP(S) result: " + result.toString() + " " + result.httpError, true);
} else {
printResponseLog(result.getHttpStatus() + " Unexpected HTTP(S) result: " + result.toString(), true);
}
return false;
}
return true;
}
private boolean errorIfResponseForbidden(HttpResult result) {
return (result.getHttpStatus() == HttpStatus.SC_FORBIDDEN);
}
And finally my HttpRetryManager:
private int leftRetries;
private long timeToWait;
public HttpRetryManager(int retries, long timeToWait) {
this.timeToWait = timeToWait;
leftRetries = retries;
}
public boolean canRetry() {
return leftRetries > 0;
}
public void onErrorUpdateCountAndSleep(BaseApiException ex) throws BaseApiException {
leftRetries--;
if (!canRetry()) {
throw ex;
}
waitUntilNextTry();
}
private long getTimeToWait() {
return timeToWait;
}
private void waitUntilNextTry() {
try {
Thread.sleep(getTimeToWait());
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
java multithreading error-handling api
asked 29 mins ago
User3User3
1191115
$endgroup$
I have the task to make a multithreaded http method. This method is my entry point (As mine is a library) for a bigger project which is a library. So the flow is like this
ProjectA ---> My Entry point Lib ----> HttpLibrary
The main features of this method are:
- Accept Multiple Requests
- Check for Http Status codes and act appropriately
- If session fails, try updating session once and retry main API call
Here is what I have come up with so far
private JsonHttpResult execJsonHttpMethod(final int requestId, BaseRequest request, int maxRequestCount) throws BaseApiException, NullPointerException {
if (maxRequestCount <= 0) {
maxRequestCount = REQUESTS_ATTEMPTS_COUNT;
}
int timeToWaitBeforeNextRequestIncaseError = 500;
HttpRetryManager httpRetryManager = new HttpRetryManager(maxRequestCount, timeToWaitBeforeNextRequestIncaseError); // Instance created for each thread
int count = 0; // Only for logging purpose - thread safe | thread local variable
JsonHttpResult result = null;
while (httpRetryManager.canRetry()) {
count++;
try {
reloginLock.readLock().lock();
final HttpMethod httpMethod = compileHttpMethod(request);
printRequestLog(request, "execJsonHttpMethod[request]: requestId=" + requestId + ", count=" + count + ", url=" + httpMethod.getURI(), false);
result = mTransportProvider.execJsonHttpMethod(httpMethod);
boolean isResEmpty = errorIfResponseEmpty(result);
if (isResEmpty) {
try {
httpRetryManager.onErrorUpdateCountAndSleep(new HttpStatusException(result.getHttpStatus(), "Unexpected empty response body"));
} catch (HttpStatusException responseEmpty) {
responseEmpty.printStackTrace();
throw responseEmpty;
}
}
boolean isSessionInvalid = errorIfResponseUnAuthorized(result);
if (isSessionInvalid) {
if (updateSessionIncaseApiGot401()) {
try {
//In-case session does not update, logout the user by escalating 401 to 403 ( InvalidSessionException() ---> InvalidUserException())
httpRetryManager.onErrorUpdateCountAndSleep(new InvalidUserException());
continue; //Start next iteration - no need to check for the rest of the conditions
} catch (InvalidUserException exceptionSessEsclatedToInvalidUser) {
exceptionSessEsclatedToInvalidUser.printStackTrace();
throw exceptionSessEsclatedToInvalidUser;
}
} else {
throw new InvalidUserException(); // WILL TRY ONLY ONCE - IF UPDATE FAILS LOGOUT - 403
}
}
//Logout user incase API threw 403 - Pops up the stack, no retry action required
if (errorIfResponseForbidden(result)) {
throw new InvalidUserException();
}
boolean isHttpErrCodeNotOk = errorIfHttpStatusNotOk(result);
if (!isHttpErrCodeNotOk) {
if (result.getHttpStatus() != HttpStatus.SC_OK && result.getHttpStatus() != HttpStatus.SC_CREATED
&& result.getHttpStatus() != HttpStatus.SC_NO_CONTENT) {
if (result.httpError != null) {
throw new HttpStatusDetailedException(result.getHttpStatus(), "Unexpected HTTP(S) result: " + result.toString(), result.httpError);
} else {
throw new HttpStatusException(result.getHttpStatus(), "Unexpected HTTP(S) result: " + result.toString());
}
}
}
//Success
HttpUUIDController.getInstance().handleSuccessRequest(request);
break;
} catch (TransportLevelException ex) {
printRequestLog(request, "execJsonHttpMethod[error]: request failed, requestId=" + requestId + ", count=" + count + ", ex=" + ex, false);
try {
httpRetryManager.onErrorUpdateCountAndSleep(ex);
} catch (Exception transportException) {
transportException.printStackTrace();
throw transportException;
}
} catch (URIException ex) {
printRequestLog(request, "execJsonHttpMethod[error]: request failed, ex=" + ex.getMessage(), false);
throw new InvalidUrlException();
} finally {
printRequestLog(request, "execJsonHttpMethod[result]: finished, requestId=" + requestId + ", count=" + count + ", result=" + result, false);
reloginLock.readLock().unlock();
}
}
simpleLog("Loop has been exited, Iterations: " + count);
return result;
}
These are my helper methods:
private boolean errorIfResponseEmpty(HttpResult result) {
if (result.getHttpStatus() == HttpStatus.SC_OK && result.getHttpResponse() == null) {
printResponseLog(result.getHttpStatus() + " Unexpected empty response body", true);
return true;
}
return false;
}
private boolean errorIfResponseUnAuthorized(HttpResult result) {
if (result.getHttpStatus() == HttpStatus.SC_UNAUTHORIZED) {
printResponseLog(result.getHttpStatus() + " Session Failed", true);
return true;
}
return false;
}
private boolean errorIfHttpStatusNotOk(HttpResult result) {
if (result.getHttpStatus() != HttpStatus.SC_OK && result.getHttpStatus() != HttpStatus.SC_CREATED && result.getHttpStatus() != HttpStatus.SC_NO_CONTENT) {
if (result.httpError != null) {
printResponseLog(result.getHttpStatus() + " Unexpected HTTP(S) result: " + result.toString() + " " + result.httpError, true);
} else {
printResponseLog(result.getHttpStatus() + " Unexpected HTTP(S) result: " + result.toString(), true);
}
return false;
}
return true;
}
private boolean errorIfResponseForbidden(HttpResult result) {
return (result.getHttpStatus() == HttpStatus.SC_FORBIDDEN);
}
And finally my HttpRetryManager:
private int leftRetries;
private long timeToWait;
public HttpRetryManager(int retries, long timeToWait) {
this.timeToWait = timeToWait;
leftRetries = retries;
}
public boolean canRetry() {
return leftRetries > 0;
}
public void onErrorUpdateCountAndSleep(BaseApiException ex) throws BaseApiException {
leftRetries--;
if (!canRetry()) {
throw ex;
}
waitUntilNextTry();
}
private long getTimeToWait() {
return timeToWait;
}
private void waitUntilNextTry() {
try {
Thread.sleep(getTimeToWait());
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
java multithreading error-handling api
java multithreading error-handling api
asked 29 mins ago
User3User3
1191115
asked 29 mins ago
User3User3
1191115
asked 29 mins ago
User3User3
1191115
asked 29 mins ago
User3User3
1191115
asked 29 mins ago
User3User3
1191115
1191115
add a comment |
add a comment |
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