SMS Service with Failsafe Mechanism

Scenario

How-To
Making good use of failsafe library can let you handle failure easily.
Remember to add dependency into your pom.xml

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<!-- retry --> <dependency> <groupId>net.jodah</groupId> <artifactId>failsafe</artifactId> <version>1.0.4</version> </dependency>

Sample code:

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private void sendSmsWithRetry(final String otp, final SmsParams params) { final String mobilePhone = params.getMobilePhone(); final CallerEnum sourceName = params.getSourceName(); final String policyNumber = params.getPolicyNumber(); final String userId = params.getUserId(); RetryPolicy retryPolicy = new RetryPolicy(); retryPolicy.withDelay(1, TimeUnit.SECONDS); // Sets the delay between retries. retryPolicy.withMaxRetries(5); // Sets the max number of retries to perform. -1 indicates to retry forever. // Creates and returns a new SyncFailsafe instance that will perform executions and // retries synchronously according to the retryPolicy. Failsafe.with(retryPolicy) // Registers the listener to be called when an execution is successful. .onSuccess(new CheckedConsumer() { @Override public void accept(Object t) throws Exception { // The execution is successful, then write success log into database } }) // Registers the listener to be called when an execution attempt fails. .onFailedAttempt(new CheckedConsumer() { @Override public void accept(Object t) throws Exception { if (t instanceof Exception) { Exception e = (Exception) t; // The execution attempt fails, then write error log into database } } }) // Registers the listener to be called when an execution fails and cannot be retried. .onFailure(new ContextualResultListener() { @Override public void onResult(Object result, Throwable failure, ExecutionContext context) throws Exception { String exeMsg = "驗證碼傳送失敗。手機號碼:" + mobilePhone + ", 失敗原因：" + failure.getMessage(); failure.printStackTrace(); throw new RuntimeException(exeMsg); } }) // Executes the runnable until successful or until the configured RetryPolicy is exceeded. .run(new CheckedRunnable() { @Override public void run() throws Exception { sendSms(mobilePhone, getSmsText(params.getOtpServiceType(), otp)); } }); }