* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
- *
+ *
* http://www.apache.org/licenses/LICENSE-2.0
- *
+ *
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
import java.util.Arrays;
import java.util.List;
import java.util.Optional;
-import java.util.concurrent.*;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.Predicate;
/**
* Class For Functional interfaces And Functional Methods
- *
- * @author mshitrit
*
+ * @author mshitrit
*/
public class FunctionalInterfaces {
- private static final int DEFAULT_REDO_INTERVAL_TIME_MS = 50;
- private static final int DEFAULT_MAX_WAIT_TIME_MS = 10000;
- private static final Logger LOGGER = Logger.getLogger(FunctionalInterfaces.class.getName());
-
- /**
- * This is an interface of a List that implements Serializable
- *
- * @author mshitrit
- *
- * @param <T>
- */
- public interface SerializableList<T> extends List<T>, Serializable {
- }
-
- /**
- * @author mshitrit Consumer that takes two parameters
- * @param <T1>
- * @param <T2>
- */
- public interface ConsumerTwoParam<T1, T2> {
- /**
- * Same Accept method, but takes two parameters
- *
- * @param t1
- * @param t2
- */
- void accept(T1 t1, T2 t2);
- }
-
- /**
- * @author mshitrit Function that takes two parameters
- * @param <T1>
- * @param <T2>
- * @param <R>
- */
- public interface FunctionTwoParam<T1, T2, R> {
- /**
- * Same apply method, but takes two parameters
- *
- * @param t1
- * @param t2
- * @return
- */
- R apply(T1 t1, T2 t2);
- }
-
- /**
- * @author mshitrit Function that throws an exception
- * @param <T>
- * @param <R>
- * @param <E>
- */
- public interface FunctionThrows<T, R, E extends Exception> {
- /**
- * Same apply method, but throws an exception
- *
- * @param t
- * @return
- */
- R apply(T t) throws E;
- }
+ private static final int DEFAULT_REDO_INTERVAL_TIME_MS = 50;
+ private static final int DEFAULT_MAX_WAIT_TIME_MS = 10000;
+ private static final Logger LOGGER = Logger.getLogger(FunctionalInterfaces.class.getName());
+
+ /**
+ * This is an interface of a List that implements Serializable
+ *
+ * @param <T>
+ * @author mshitrit
+ */
+ public interface SerializableList<T> extends List<T>, Serializable {
+ }
+
+ /**
+ * @param <T1>
+ * @param <T2>
+ * @author mshitrit Consumer that takes two parameters
+ */
+ public interface ConsumerTwoParam<T1, T2> {
+ /**
+ * Same Accept method, but takes two parameters
+ *
+ * @param t1
+ * @param t2
+ */
+ void accept(T1 t1, T2 t2);
+ }
+
+ /**
+ * @param <T1>
+ * @param <T2>
+ * @param <R>
+ * @author mshitrit Function that takes two parameters
+ */
+ public interface FunctionTwoParam<T1, T2, R> {
+ /**
+ * Same apply method, but takes two parameters
+ *
+ * @param t1
+ * @param t2
+ * @return
+ */
+ R apply(T1 t1, T2 t2);
+ }
+
+ /**
+ * @param <T>
+ * @param <R>
+ * @param <E>
+ * @author mshitrit Function that throws an exception
+ */
+ public interface FunctionThrows<T, R, E extends Exception> {
+ /**
+ * Same apply method, but throws an exception
+ *
+ * @param t
+ * @return
+ */
+ R apply(T t) throws E;
+ }
public interface FunctionTwoParamThrows<T1, T2, R, E extends Exception> {
/**
* Same apply method, but throws an exception
- *
+ *
* @param t1
* @param t2
* @return
R apply(T1 t1, T2 t2) throws E;
}
- /**
- * @author mshitrit Supplier that throws an exception
- * @param <R>
- * @param <E>
- */
- public interface SupplierThrows<R, E extends Exception> {
- /**
- * Same get method, but throws an exception
- *
- * @return
- * @throws E
- */
- R get() throws E;
- }
-
- /**
- * @author mshitrit Consumer that throws an exception
- * @param <T>
- * @param <E>
- */
- public interface ConsumerThrows<T, E extends Exception> {
- /**
- * Same accept, but throws an exception
- *
- * @param t
- * @throws E
- */
- void accept(T t) throws E;
- }
-
- /**
- * @author mshitrit Runnable that throws an exception
- * @param <E>
- */
- public interface RunnableThrows<E extends Exception> {
- /**
- * Same run, but throws an exception
- *
- * @throws E
- */
- void run() throws E;
- }
-
- /**
- * Runs a method that declares throwing an Exception and has a return value.
- * <br>
- * In case Exception Occurred replaces it with FunctionalAttException. <br>
- * This is useful for two cases:<br>
- * 1.using methods that throws exceptions in streams.<br>
- * 2.replacing declared exception with undeclared exception (Runtime).<br>
- * See below Use Case:<br>
- * Instead of: intList.stream().map(e -> fooThrowsAndReturnsBoolean(e)); -
- * does not compile !<br>
- * Use This : intList.stream().map(e -> swallowException( () ->
- * fooThrowsAndReturnsBoolean(e))); - compiles !<br>
- *
- * @param methodToRun
- * @return
- */
- public static <R, E extends Exception> R swallowException(SupplierThrows<R, E> methodToRun) {
- try {
+ /**
+ * @param <R>
+ * @param <E>
+ * @author mshitrit Supplier that throws an exception
+ */
+ public interface SupplierThrows<R, E extends Exception> {
+ /**
+ * Same get method, but throws an exception
+ *
+ * @return
+ * @throws E
+ */
+ R get() throws E;
+ }
+
+ /**
+ * @param <T>
+ * @param <E>
+ * @author mshitrit Consumer that throws an exception
+ */
+ public interface ConsumerThrows<T, E extends Exception> {
+ /**
+ * Same accept, but throws an exception
+ *
+ * @param t
+ * @throws E
+ */
+ void accept(T t) throws E;
+ }
+
+ /**
+ * @param <E>
+ * @author mshitrit Runnable that throws an exception
+ */
+ public interface RunnableThrows<E extends Exception> {
+ /**
+ * Same run, but throws an exception
+ *
+ * @throws E
+ */
+ void run() throws E;
+ }
+
+ /**
+ * Runs a method that declares throwing an Exception and has a return value.
+ * <br>
+ * In case Exception Occurred replaces it with FunctionalAttException. <br>
+ * This is useful for two cases:<br>
+ * 1.using methods that throws exceptions in streams.<br>
+ * 2.replacing declared exception with undeclared exception (Runtime).<br>
+ * See below Use Case:<br>
+ * Instead of: intList.stream().map(e -> fooThrowsAndReturnsBoolean(e)); -
+ * does not compile !<br>
+ * Use This : intList.stream().map(e -> swallowException( () ->
+ * fooThrowsAndReturnsBoolean(e))); - compiles !<br>
+ *
+ * @param methodToRun
+ * @return
+ */
+ public static <R, E extends Exception> R swallowException(SupplierThrows<R, E> methodToRun) {
+ try {
return methodToRun.get();
- } catch (Exception e) {
- throw new FunctionalAttException(e);
- }
- }
-
- /**
- * Runs a method that declares throwing an Exception without return value.
- * <br>
- * In case Exception Occurred replaces it with FunctionalAttException. <br>
- * This is useful for two cases:<br>
- * 1.using methods that throws exceptions in streams.<br>
- * 2.replacing declared exception with undeclared exception (Runtime).<br>
- * See below Use Case:<br>
- *
- * @param methodToRun
- */
- public static <E extends Exception> void swallowException(RunnableThrows<E> methodToRun) {
-
- SupplierThrows<Boolean, E> runnableWrapper = () -> {
- methodToRun.run();
- return true;
- };
- swallowException(runnableWrapper);
- }
-
- private static class FunctionalAttException extends RuntimeException {
- private static final long serialVersionUID = 1L;
-
- private FunctionalAttException(Exception e) {
- super(e);
- }
- }
-
- /**
- * Runs the given method.<br>
- * Verify the method result against the resultVerifier.<br>
- * If verification passed returns the result.<br>
- * If Verification failed keeps retrying until it passes or until 10 seconds
- * pass.<br>
- * If Exception Occurred keeps retrying until it passes or until 10 seconds
- * pass,<br>
- * If last retry result caused an exception - it is thrown.
- *
- * @param methodToRun
- * given Method
- * @param resultVerifier
- * verifier for the method result
- * @return
- */
- public static <R> R retryMethodOnResult(Supplier<R> methodToRun, Function<R, Boolean> resultVerifier) {
- return retryMethodOnResult(methodToRun, resultVerifier, DEFAULT_MAX_WAIT_TIME_MS,
- DEFAULT_REDO_INTERVAL_TIME_MS);
- }
-
- /**
- * Runs the given method.<br>
- * Verify the method result against the resultVerifier.<br>
- * If verification passed returns the result.<br>
- * If Verification failed keeps retrying until it passes or until maxWait
- * pass.<br>
- * If Exception Occurred keeps retrying until it passes or until maxWait
- * pass,<br>
- * If last retry result caused an exception - it is thrown.
- *
- * @param methodToRun
- * given Method
- * @param resultVerifier
- * verifier for the method result
- * @param maxWaitMS
- * @param retryIntervalMS
- * @return
- */
- public static <R> R retryMethodOnResult(Supplier<R> methodToRun, Function<R, Boolean> resultVerifier,
- long maxWaitMS, long retryIntervalMS) {
- boolean stopSearch = false;
- R ret = null;
- int timeElapsed = 0;
- FunctionalAttException functionalExceotion = null;
- boolean isExceptionInLastTry = false;
- while (!stopSearch) {
- try {
- ret = methodToRun.get();
- stopSearch = resultVerifier.apply(ret);
- isExceptionInLastTry = false;
- } catch (Exception e) {
- functionalExceotion = new FunctionalAttException(e);
- isExceptionInLastTry = true;
-
- } finally {
- sleep(retryIntervalMS);
- timeElapsed += retryIntervalMS;
- if (timeElapsed > maxWaitMS) {
- stopSearch = true;
- }
- }
-
- }
- if (isExceptionInLastTry) {
- throw functionalExceotion;
- } else {
- return ret;
- }
-
- }
-
- /**
- * Runs the given method.<br>
- * Verify the method result against the resultVerifier.<br>
- * If verification passed returns the result.<br>
- * If Verification failed keeps retrying until maxRetries reached.<br>
- * If Exception Occurred keeps retrying until it passes or until maxRetries
- * reached,<br>
- * If last retry result caused an exception - it is thrown.
- *
- * @param methodToRun
- * given Method
- * @param resultVerifier
- * verifier for the method result
- * @param maxRetries
- * @return
- */
- public static <R> R retryMethodOnResult(Supplier<R> methodToRun, Function<R, Boolean> resultVerifier,
- long maxRetries) {
- boolean stopSearch = false;
- R ret = null;
- int retriesCount = 0;
- FunctionalAttException functionalExceotion = null;
- boolean isExceptionInLastTry = false;
- while (!stopSearch) {
- try {
- ret = methodToRun.get();
- stopSearch = resultVerifier.apply(ret);
- isExceptionInLastTry = false;
- } catch (Exception e) {
- functionalExceotion = new FunctionalAttException(e);
- isExceptionInLastTry = true;
- } finally {
- if (++retriesCount >= maxRetries) {
- stopSearch = true;
- }
- }
- }
- if (isExceptionInLastTry) {
- throw functionalExceotion;
- } else {
- return ret;
- }
- }
-
- public static <R> R retryMethodOnException(SupplierThrows<R, Exception> methodToRun,
- Function<Exception, Boolean> exceptionVerifier, long maxRetries) throws Exception {
+ } catch (Exception e) {
+ throw new FunctionalAttException(e);
+ }
+ }
+
+ /**
+ * Runs a method that declares throwing an Exception without return value.
+ * <br>
+ * In case Exception Occurred replaces it with FunctionalAttException. <br>
+ * This is useful for two cases:<br>
+ * 1.using methods that throws exceptions in streams.<br>
+ * 2.replacing declared exception with undeclared exception (Runtime).<br>
+ * See below Use Case:<br>
+ *
+ * @param methodToRun
+ */
+ public static <E extends Exception> void swallowException(RunnableThrows<E> methodToRun) {
+
+ SupplierThrows<Boolean, E> runnableWrapper = () -> {
+ methodToRun.run();
+ return true;
+ };
+ swallowException(runnableWrapper);
+ }
+
+ private static class FunctionalAttException extends RuntimeException {
+ private static final long serialVersionUID = 1L;
+
+ private FunctionalAttException(Exception e) {
+ super(e);
+ }
+ }
+
+ /**
+ * Runs the given method.<br>
+ * Verify the method result against the resultVerifier.<br>
+ * If verification passed returns the result.<br>
+ * If Verification failed keeps retrying until it passes or until 10 seconds
+ * pass.<br>
+ * If Exception Occurred keeps retrying until it passes or until 10 seconds
+ * pass,<br>
+ * If last retry result caused an exception - it is thrown.
+ *
+ * @param methodToRun given Method
+ * @param resultVerifier verifier for the method result
+ * @return
+ */
+ public static <R> R retryMethodOnResult(Supplier<R> methodToRun, Function<R, Boolean> resultVerifier) {
+ return retryMethodOnResult(methodToRun, resultVerifier, DEFAULT_MAX_WAIT_TIME_MS,
+ DEFAULT_REDO_INTERVAL_TIME_MS);
+ }
+
+ /**
+ * Runs the given method.<br>
+ * Verify the method result against the resultVerifier.<br>
+ * If verification passed returns the result.<br>
+ * If Verification failed keeps retrying until it passes or until maxWait
+ * pass.<br>
+ * If Exception Occurred keeps retrying until it passes or until maxWait
+ * pass,<br>
+ * If last retry result caused an exception - it is thrown.
+ *
+ * @param methodToRun given Method
+ * @param resultVerifier verifier for the method result
+ * @param maxWaitMS
+ * @param retryIntervalMS
+ * @return
+ */
+ public static <R> R retryMethodOnResult(Supplier<R> methodToRun, Function<R, Boolean> resultVerifier,
+ long maxWaitMS, long retryIntervalMS) {
+ boolean stopSearch = false;
+ R ret = null;
+ int timeElapsed = 0;
+ FunctionalAttException functionalExceotion = null;
+ boolean isExceptionInLastTry = false;
+ while (!stopSearch) {
+ try {
+ ret = methodToRun.get();
+ stopSearch = resultVerifier.apply(ret);
+ isExceptionInLastTry = false;
+ } catch (Exception e) {
+ functionalExceotion = new FunctionalAttException(e);
+ isExceptionInLastTry = true;
+
+ } finally {
+ sleep(retryIntervalMS);
+ timeElapsed += retryIntervalMS;
+ if (timeElapsed > maxWaitMS) {
+ stopSearch = true;
+ }
+ }
+
+ }
+ if (isExceptionInLastTry) {
+ throw functionalExceotion;
+ } else {
+ return ret;
+ }
+
+ }
+
+ /**
+ * Runs the given method.<br>
+ * Verify the method result against the resultVerifier.<br>
+ * If verification passed returns the result.<br>
+ * If Verification failed keeps retrying until maxRetries reached.<br>
+ * If Exception Occurred keeps retrying until it passes or until maxRetries
+ * reached,<br>
+ * If last retry result caused an exception - it is thrown.
+ *
+ * @param methodToRun given Method
+ * @param resultVerifier verifier for the method result
+ * @param maxRetries
+ * @return
+ */
+ public static <R> R retryMethodOnResult(Supplier<R> methodToRun, Function<R, Boolean> resultVerifier,
+ long maxRetries) {
+ boolean stopSearch = false;
+ R ret = null;
+ int retriesCount = 0;
+ FunctionalAttException functionalExceotion = null;
+ boolean isExceptionInLastTry = false;
+ while (!stopSearch) {
+ try {
+ ret = methodToRun.get();
+ stopSearch = resultVerifier.apply(ret);
+ isExceptionInLastTry = false;
+ } catch (Exception e) {
+ functionalExceotion = new FunctionalAttException(e);
+ isExceptionInLastTry = true;
+ } finally {
+ if (++retriesCount >= maxRetries) {
+ stopSearch = true;
+ }
+ }
+ }
+ if (isExceptionInLastTry) {
+ throw functionalExceotion;
+ } else {
+ return ret;
+ }
+ }
+
+ public static <R> R retryMethodOnException(SupplierThrows<R, Exception> methodToRun,
+ Function<Exception, Boolean> exceptionVerifier, long maxRetries) throws Exception {
boolean stopSearch = false;
R ret = null;
int retriesCount = 0;
exception = null;
ret = methodToRun.get();
stopSearch = true;
- }
- catch (Exception e) {
+ } catch (Exception e) {
exception = e;
stopSearch = exceptionVerifier.apply(e);
- }
- finally {
+ } finally {
if (++retriesCount >= maxRetries) {
stopSearch = true;
}
}
if (exception != null) {
throw exception;
- }
- else {
+ } else {
return ret;
}
}
- /**
- * Runs the given method.<br>
- * In case exception occurred runs the method again either until succeed or
- * until 10 seconds pass.
- *
- * @param methodToRun
- * given method
- * @return
- */
-
- public static <R> R retryMethodOnException(Supplier<R> methodToRun) {
- Function<R, Boolean> dummyVerifier = someResult -> true;
- return retryMethodOnResult(methodToRun, dummyVerifier, DEFAULT_MAX_WAIT_TIME_MS, DEFAULT_REDO_INTERVAL_TIME_MS);
- }
-
- /**
- * Runs the given method.<br>
- * In case exception occurred runs the method again either until succeed or
- * until 10 seconds pass.
- *
- * @param methodToRun
- * given method
- */
- public static void retryMethodOnException(Runnable methodToRun) {
- Function<Boolean, Boolean> dummyVerifier = someResult -> true;
- Supplier<Boolean> dummySupplier = () -> {
- methodToRun.run();
- return true;
- };
- retryMethodOnResult(dummySupplier, dummyVerifier, DEFAULT_MAX_WAIT_TIME_MS, DEFAULT_REDO_INTERVAL_TIME_MS);
- }
-
- /**
- * Same as Thread.sleep but throws a FunctionalAttException
- * (RuntimeException) instead of InterruptedException.<br>
- *
- * @param millis
- */
- public static void sleep(long millis) {
- swallowException(() -> Thread.sleep(millis));
-
- }
-
- /**
- * Converts Either containing right value to another either with different
- * type of left value and the same type of right value.
- *
- * @param eitherToConvert
- * @return
- */
- public static <T1, T2, T3> Either<T1, T2> convertEitherRight(Either<T3, T2> eitherToConvert) {
- if (eitherToConvert.isLeft()) {
- throw new UnsupportedOperationException("Can not convert either right value because it has left value");
- } else {
- return Either.right(eitherToConvert.right().value());
- }
-
- }
-
- /**
- * Converts Either containing left value to another either with different
- * type of right value and the same type of left value.
- *
- * @param eitherToConvert
- * @return
- */
- public static <T1, T2, T3> Either<T1, T2> convertEitherLeft(Either<T1, T3> eitherToConvert) {
- if (eitherToConvert.isLeft()) {
- throw new UnsupportedOperationException("Can not convert either left value because it has right value");
- } else {
- return Either.left(eitherToConvert.left().value());
- }
-
- }
-
- /**
- * Returns enum value for a field <br>
- *
- * @param fieldValue
- * @param values
- * @param enumValueGetter
- * @return
- */
- public static <T extends Enum<T>> T getEnumValueByFieldValue(String fieldValue, T[] values,
- Function<T, String> enumValueGetter, T defaultValue) {
- return getEnumValueByFieldValue(fieldValue, values, enumValueGetter, defaultValue, true);
-
- }
-
-
- public static <T extends Enum<T>> T getEnumValueByFieldValue(String fieldValue, T[] values,
- Function<T, String> enumValueGetter, T defaultValue, boolean isCaseSensetive ){
-
- final Predicate<? super T> predicate;
- if( isCaseSensetive ){
- predicate = e -> fieldValue.equals(enumValueGetter.apply(e));
- }
- else{
- predicate = e -> fieldValue.equalsIgnoreCase(enumValueGetter.apply(e));
- }
- Optional<T> optionalFound =
- // Stream of values of enum
- Arrays.asList(values).stream().
- // Filter in the one that match the field
- filter(predicate).
- // collect
- findAny();
- T ret;
- ret = optionalFound.isPresent() ? optionalFound.get() : defaultValue;
- return ret;
-
- }
-
- /**
- * This method runs the given method.<br>
- * In case given method finished running within timeoutInMs limit it returns
- * Either which left value is the result of the method that ran.<br>
- * In case given method did not finish running within timeoutInMs limit it
- * returns Either which right value is false. <br>
- *
- * @param supplier
- * @param timeoutInMs
- * - if 0 or lower no timeout is used
- * @return
- */
- public static <T> Either<T, Boolean> runMethodWithTimeOut(Supplier<T> supplier, long timeoutInMs) {
- Either<T, Boolean> result;
- if (timeoutInMs <= NumberUtils.LONG_ZERO) {
- result = Either.left(supplier.get());
- } else {
- ExecutorService pool = Executors.newSingleThreadExecutor();
- Future<T> future = pool.submit(supplier::get);
- try {
- T calcValue = future.get(timeoutInMs, TimeUnit.MILLISECONDS);
- result = Either.left(calcValue);
- } catch (InterruptedException e) {
- LOGGER.debug("InterruptedException in runMethodWithTimeOut", e);
- Thread.currentThread().interrupt();
- result = Either.right(false);
- } catch (ExecutionException | TimeoutException e) {
- LOGGER.debug("method run was canceled because it has passed its time limit of {} MS", timeoutInMs, e);
- result = Either.right(false);
- } finally {
- pool.shutdownNow();
- }
- }
- return result;
- }
-
- public static <T> F<T, Boolean> convertToFunction(Consumer<T> consumer) {
+ /**
+ * Runs the given method.<br>
+ * In case exception occurred runs the method again either until succeed or
+ * until 10 seconds pass.
+ *
+ * @param methodToRun given method
+ * @return
+ */
+
+ public static <R> R retryMethodOnException(Supplier<R> methodToRun) {
+ Function<R, Boolean> dummyVerifier = someResult -> true;
+ return retryMethodOnResult(methodToRun, dummyVerifier, DEFAULT_MAX_WAIT_TIME_MS, DEFAULT_REDO_INTERVAL_TIME_MS);
+ }
+
+ /**
+ * Runs the given method.<br>
+ * In case exception occurred runs the method again either until succeed or
+ * until 10 seconds pass.
+ *
+ * @param methodToRun given method
+ */
+ public static void retryMethodOnException(Runnable methodToRun) {
+ Function<Boolean, Boolean> dummyVerifier = someResult -> true;
+ Supplier<Boolean> dummySupplier = () -> {
+ methodToRun.run();
+ return true;
+ };
+ retryMethodOnResult(dummySupplier, dummyVerifier, DEFAULT_MAX_WAIT_TIME_MS, DEFAULT_REDO_INTERVAL_TIME_MS);
+ }
+
+ /**
+ * Same as Thread.sleep but throws a FunctionalAttException
+ * (RuntimeException) instead of InterruptedException.<br>
+ *
+ * @param millis
+ */
+ public static void sleep(long millis) {
+ swallowException(() -> Thread.sleep(millis));
+
+ }
+
+ /**
+ * Converts Either containing right value to another either with different
+ * type of left value and the same type of right value.
+ *
+ * @param eitherToConvert
+ * @return
+ */
+ public static <T1, T2, T3> Either<T1, T2> convertEitherRight(Either<T3, T2> eitherToConvert) {
+ if (eitherToConvert.isLeft()) {
+ throw new UnsupportedOperationException("Can not convert either right value because it has left value");
+ } else {
+ return Either.right(eitherToConvert.right().value());
+ }
+
+ }
+
+ /**
+ * Converts Either containing left value to another either with different
+ * type of right value and the same type of left value.
+ *
+ * @param eitherToConvert
+ * @return
+ */
+ public static <T1, T2, T3> Either<T1, T2> convertEitherLeft(Either<T1, T3> eitherToConvert) {
+ if (eitherToConvert.isLeft()) {
+ throw new UnsupportedOperationException("Can not convert either left value because it has right value");
+ } else {
+ return Either.left(eitherToConvert.left().value());
+ }
+
+ }
+
+ /**
+ * Returns enum value for a field <br>
+ *
+ * @param fieldValue
+ * @param values
+ * @param enumValueGetter
+ * @return
+ */
+ public static <T extends Enum<T>> T getEnumValueByFieldValue(String fieldValue, T[] values,
+ Function<T, String> enumValueGetter, T defaultValue) {
+ return getEnumValueByFieldValue(fieldValue, values, enumValueGetter, defaultValue, true);
+
+ }
+
+
+ public static <T extends Enum<T>> T getEnumValueByFieldValue(String fieldValue, T[] values,
+ Function<T, String> enumValueGetter, T defaultValue, boolean isCaseSensetive) {
+
+ final Predicate<? super T> predicate;
+ if (isCaseSensetive) {
+ predicate = e -> fieldValue.equals(enumValueGetter.apply(e));
+ } else {
+ predicate = e -> fieldValue.equalsIgnoreCase(enumValueGetter.apply(e));
+ }
+ Optional<T> optionalFound =
+ // Stream of values of enum
+ Arrays.asList(values).stream().
+ // Filter in the one that match the field
+ filter(predicate).
+ // collect
+ findAny();
+ T ret;
+ ret = optionalFound.isPresent() ? optionalFound.get() : defaultValue;
+ return ret;
+
+ }
+
+ /**
+ * This method runs the given method.<br>
+ * In case given method finished running within timeoutInMs limit it returns
+ * Either which left value is the result of the method that ran.<br>
+ * In case given method did not finish running within timeoutInMs limit it
+ * returns Either which right value is false. <br>
+ *
+ * @param supplier
+ * @param timeoutInMs - if 0 or lower no timeout is used
+ * @return
+ */
+ public static <T> Either<T, Boolean> runMethodWithTimeOut(Supplier<T> supplier, long timeoutInMs) {
+ Either<T, Boolean> result;
+ if (timeoutInMs <= NumberUtils.LONG_ZERO) {
+ result = Either.left(supplier.get());
+ } else {
+ ExecutorService pool = Executors.newSingleThreadExecutor();
+ Future<T> future = pool.submit(supplier::get);
+ try {
+ T calcValue = future.get(timeoutInMs, TimeUnit.MILLISECONDS);
+ result = Either.left(calcValue);
+ } catch (InterruptedException e) {
+ LOGGER.debug("InterruptedException in runMethodWithTimeOut", e);
+ Thread.currentThread().interrupt();
+ result = Either.right(false);
+ } catch (ExecutionException | TimeoutException e) {
+ LOGGER.debug("method run was canceled because it has passed its time limit of {} MS", timeoutInMs, e);
+ result = Either.right(false);
+ } finally {
+ pool.shutdownNow();
+ }
+ }
+ return result;
+ }
+
+ public static <T> F<T, Boolean> convertToFunction(Consumer<T> consumer) {
return t -> {
try {
consumer.accept(t);
return false;
}
};
- }
+ }
}
Code Review / sdc.git / blobdiff