Examples of java.util.concurrent.Future

java.util.concurrent.Future
ther things while searching try { displayText(future.get()); // use future } catch (ExecutionException ex) { cleanup(); return; } } }} The {@link FutureTask} class is an implementation of {@code Future} thatimplements {@code Runnable}, and so may be executed by an {@code Executor}. For example, the above construction with {@code submit} could be replaced by:
```
  {@code FutureTask future =}new FutureTask(new Callable()  public String call() { return searcher.search(target); }}); executor.execute(future);}
```
Memory consistency effects: Actions taken by the asynchronous computation happen-before actions following the corresponding {@code Future.get()} in another thread. @see FutureTask @see Executor @since 1.5 @author Doug Lea @param < V> The result type returned by this Future's {@code get} method


    Object pollInternal(long timeout) throws InterruptedException {
        PollOperation operation = new PollOperation(name, timeout);
        final NodeEngine nodeEngine = getNodeEngine();
        try {
            Future f = nodeEngine.getOperationService().invokeOnPartition(QueueService.SERVICE_NAME, operation, getPartitionId());
            return f.get();
        } catch (Throwable throwable) {
            throw ExceptionUtil.rethrowAllowInterrupted(throwable);
        }
    }

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    }


    private <T> T invoke(QueueOperation operation) {
        final NodeEngine nodeEngine = getNodeEngine();
        try {
            Future f = nodeEngine.getOperationService().invokeOnPartition(QueueService.SERVICE_NAME,operation,partitionId);
            return (T) nodeEngine.toObject(f.get());
        } catch (Throwable throwable) {
            throw ExceptionUtil.rethrow(throwable);
        }
    }

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    }


    private Object invokeData(QueueOperation operation) {
        final NodeEngine nodeEngine = getNodeEngine();
        try {
            Future f = nodeEngine.getOperationService().invokeOnPartition(QueueService.SERVICE_NAME,operation,partitionId);
            return f.get();
        } catch (Throwable throwable) {
            throw ExceptionUtil.rethrow(throwable);
        }
    }

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    private Object invokeOperation(Data key, KeyBasedMapOperation operation) {
        final NodeEngine nodeEngine = getNodeEngine();
        int partitionId = nodeEngine.getPartitionService().getPartitionId(key);
        operation.setThreadId(ThreadUtil.getThreadId());
        try {
            Future f;
            Object o;
            OperationService operationService = nodeEngine.getOperationService();
            if (getMapConfig().isStatisticsEnabled()) {
                long time = System.currentTimeMillis();
                f = operationService
                        .createInvocationBuilder(SERVICE_NAME, operation, partitionId)
                        .setResultDeserialized(false)
                        .invoke();
                o = f.get();
                if (operation instanceof BasePutOperation)
                    localMapStats.incrementPuts(System.currentTimeMillis() - time);
                else if (operation instanceof BaseRemoveOperation)
                    localMapStats.incrementRemoves(System.currentTimeMillis() - time);
                else if (operation instanceof GetOperation)
                    localMapStats.incrementGets(System.currentTimeMillis() - time);


            } else {
                f = operationService.createInvocationBuilder(SERVICE_NAME, operation, partitionId)
                        .setResultDeserialized(false).invoke();
                o = f.get();
            }
            return o;
        } catch (Throwable t) {
            throw ExceptionUtil.rethrow(t);
        }

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        final NodeEngine nodeEngine = getNodeEngine();
        int partitionId = nodeEngine.getPartitionService().getPartitionId(key);
        ContainsKeyOperation containsKeyOperation = new ContainsKeyOperation(name, key);
        containsKeyOperation.setServiceName(SERVICE_NAME);
        try {
            Future f = nodeEngine.getOperationService().invokeOnPartition(SERVICE_NAME, containsKeyOperation,
                    partitionId);
            return (Boolean) getService().toObject(f.get());
        } catch (Throwable t) {
            throw ExceptionUtil.rethrow(t);
        }
    }

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        Collection<MemberImpl> members = nodeEngine.getClusterService().getMemberList();
        for (MemberImpl member : members) {
            try {
                if (member.localMember())
                    continue;
                Future f = nodeEngine.getOperationService()
                        .invokeOnTarget(SERVICE_NAME, new AddInterceptorOperation(id, interceptor, name),
                                member.getAddress());
                f.get();
            } catch (Throwable t) {
                throw ExceptionUtil.rethrow(t);
            }
        }
        return id;

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        for (Member member : members) {
            try {
                if (member.localMember())
                    continue;
                MemberImpl memberImpl = (MemberImpl) member;
                Future f = nodeEngine.getOperationService()
                        .invokeOnTarget(SERVICE_NAME, new RemoveInterceptorOperation(name, id), memberImpl.getAddress());
                f.get();
            } catch (Throwable t) {
                throw ExceptionUtil.rethrow(t);
            }
        }
    }

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        final NodeEngine nodeEngine = getNodeEngine();
        int partitionId = nodeEngine.getPartitionService().getPartitionId(key);
        GetEntryViewOperation getEntryViewOperation = new GetEntryViewOperation(name, key);
        getEntryViewOperation.setServiceName(SERVICE_NAME);
        try {
            Future f = nodeEngine.getOperationService().invokeOnPartition(SERVICE_NAME, getEntryViewOperation, partitionId);
            Object o = getService().toObject(f.get());
            return (EntryView) o;
        } catch (Throwable t) {
            throw new RuntimeException(t);
        }
    }

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        final NodeEngine nodeEngine = getNodeEngine();
        int partitionId = nodeEngine.getPartitionService().getPartitionId(key);
        EntryOperation operation = new EntryOperation(name, key, entryProcessor);
        operation.setThreadId(ThreadUtil.getThreadId());
        try {
            Future future = nodeEngine.getOperationService()
                    .createInvocationBuilder(SERVICE_NAME, operation, partitionId)
                    .setResultDeserialized(false)
                    .invoke();
            final Data data = (Data) future.get();
            invalidateNearCache(key);
            return data;
        } catch (Throwable t) {
            throw ExceptionUtil.rethrow(t);
        }

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            result = new SortedQueryResultSet(pagingPredicate.getComparator(), iterationType, pagingPredicate.getPageSize());
        }


        List<Integer> returnedPartitionIds = new ArrayList<Integer>();
        try {
            Future future = operationService
                    .invokeOnTarget(SERVICE_NAME,
                            new QueryOperation(name, predicate),
                            nodeEngine.getThisAddress());
            QueryResult queryResult = (QueryResult) future.get();
            if (queryResult != null) {
                returnedPartitionIds = queryResult.getPartitionIds();
                if (pagingPredicate == null) {
                    result.addAll(queryResult.getResult());
                } else {
                    for (QueryResultEntry queryResultEntry : queryResult.getResult()) {
                        Object key = ss.toObject(queryResultEntry.getKeyData());
                        Object value = ss.toObject(queryResultEntry.getValueData());
                        result.add(new AbstractMap.SimpleImmutableEntry(key, value));
                    }
                }
            }


            if (returnedPartitionIds.size() == partitionIds.size()) {
                if (pagingPredicate != null) {
                    PagingPredicateAccessor.setPagingPredicateAnchor(pagingPredicate, ((SortedQueryResultSet) result).last());
                }
                return result;
            }
            List<Integer> missingList = new ArrayList<Integer>();
            for (Integer partitionId : partitionIds) {
                if (!returnedPartitionIds.contains(partitionId))
                    missingList.add(partitionId);
            }
            List<Future> futures = new ArrayList<Future>(missingList.size());
            for (Integer pid : missingList) {
                QueryPartitionOperation queryPartitionOperation = new QueryPartitionOperation(name, predicate);
                queryPartitionOperation.setPartitionId(pid);
                try {
                    Future f =
                            operationService.invokeOnPartition(SERVICE_NAME, queryPartitionOperation, pid);
                    futures.add(f);
                } catch (Throwable t) {
                    throw ExceptionUtil.rethrow(t);
                }
            }
            for (Future f : futures) {
                QueryResult qResult = (QueryResult) f.get();
                if (pagingPredicate == null) {
                    result.addAll(qResult.getResult());
                } else {
                    for (QueryResultEntry queryResultEntry : qResult.getResult()) {
                        Object key = ss.toObject(queryResultEntry.getKeyData());

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