Examples with ContinuousQuery org.apache.ignite.cache.query.ContinuousQuery used on opensource projects

Example 56 with ContinuousQuery

use of org.apache.ignite.cache.query.ContinuousQuery in project ignite by apache.

the class JavaThinClient method continuousQueries.

void continuousQueries() throws Exception {
    ClientConfiguration clientCfg = new ClientConfiguration().setAddresses("127.0.0.1:10800");
    try (IgniteClient client = Ignition.startClient(clientCfg)) {
        // tag::continuous-queries[]
        ClientCache<Integer, String> cache = client.getOrCreateCache("myCache");
        ContinuousQuery<Integer, String> query = new ContinuousQuery<>();
        query.setLocalListener(new CacheEntryUpdatedListener<Integer, String>() {

            @Override
            public void onUpdated(Iterable<CacheEntryEvent<? extends Integer, ? extends String>> events) throws CacheEntryListenerException {
            // react to the update events here
            }
        });
        ClientDisconnectListener disconnectListener = new ClientDisconnectListener() {

            @Override
            public void onDisconnected(Exception reason) {
            // react to the disconnect event here
            }
        };
        cache.query(query, disconnectListener);
    // end::continuous-queries[]
    }
}

Example 57 with ContinuousQuery

use of org.apache.ignite.cache.query.ContinuousQuery in project ignite by apache.

the class IgniteCacheProxyImpl method query.

/**
 * {@inheritDoc}
 */
@Override
public <R> QueryCursor<R> query(Query<R> qry) {
    GridCacheContext<K, V> ctx = getContextSafe();
    A.notNull(qry, "qry");
    try {
        ctx.checkSecurity(SecurityPermission.CACHE_READ);
        validate(qry);
        convertToBinary(qry);
        CacheOperationContext opCtxCall = ctx.operationContextPerCall();
        boolean keepBinary = opCtxCall != null && opCtxCall.isKeepBinary();
        if (qry instanceof ContinuousQuery || qry instanceof ContinuousQueryWithTransformer)
            return (QueryCursor<R>) queryContinuous((AbstractContinuousQuery) qry, qry.isLocal(), keepBinary);
        if (qry instanceof SqlQuery)
            return (QueryCursor<R>) ctx.kernalContext().query().querySql(ctx, (SqlQuery) qry, keepBinary);
        if (qry instanceof SqlFieldsQuery)
            return (FieldsQueryCursor<R>) ctx.kernalContext().query().querySqlFields(ctx, (SqlFieldsQuery) qry, null, keepBinary, true).get(0);
        if (qry instanceof ScanQuery)
            return query((ScanQuery) qry, null, projection(qry.isLocal()));
        return (QueryCursor<R>) query(qry, projection(qry.isLocal()));
    } catch (IgniteCheckedException e) {
        throw cacheException(e);
    } catch (Exception e) {
        if (e instanceof CacheException)
            throw (CacheException) e;
        throw new CacheException(e.getMessage(), e);
    }
}

Example 58 with ContinuousQuery

use of org.apache.ignite.cache.query.ContinuousQuery in project ignite by apache.

the class JavaThinCompatibilityTest method testContinuousQueries.

/**
 */
private void testContinuousQueries() throws Exception {
    X.println(">>>> Testing continuous queries");
    try (IgniteClient client = Ignition.startClient(new ClientConfiguration().setAddresses(ADDR))) {
        ClientCache<Object, Object> cache = client.getOrCreateCache("testContinuousQueries");
        List<CacheEntryEvent<?, ?>> allEvts = new ArrayList<>();
        cache.query(new ContinuousQuery<>().setLocalListener(evts -> evts.forEach(allEvts::add)));
        cache.put(0, 0);
        cache.put(0, 1);
        cache.remove(0);
        assertTrue(GridTestUtils.waitForCondition(() -> allEvts.size() == 3, 1_000L));
    }
}

Example 59 with ContinuousQuery

use of org.apache.ignite.cache.query.ContinuousQuery in project ignite by apache.

the class UsingContinuousQueries method localListenerExample.

public static void localListenerExample() {
    try (Ignite ignite = Ignition.start()) {
        // tag::localListener[]
        IgniteCache<Integer, String> cache = ignite.getOrCreateCache("myCache");
        ContinuousQuery<Integer, String> query = new ContinuousQuery<>();
        query.setLocalListener(new CacheEntryUpdatedListener<Integer, String>() {

            @Override
            public void onUpdated(Iterable<CacheEntryEvent<? extends Integer, ? extends String>> events) throws CacheEntryListenerException {
            // react to the update events here
            }
        });
        cache.query(query);
    // end::localListener[]
    }
}

Example 60 with ContinuousQuery

use of org.apache.ignite.cache.query.ContinuousQuery in project ignite by apache.

the class UsingContinuousQueries method remoteFilterExample.

public static void remoteFilterExample() {
    try (Ignite ignite = Ignition.start()) {
        IgniteCache<Integer, String> cache = ignite.getOrCreateCache("myCache");
        // tag::remoteFilter[]
        ContinuousQuery<Integer, String> qry = new ContinuousQuery<>();
        qry.setLocalListener(events -> events.forEach(event -> System.out.format("Entry: key=[%s] value=[%s]\n", event.getKey(), event.getValue())));
        qry.setRemoteFilterFactory(new Factory<CacheEntryEventFilter<Integer, String>>() {

            @Override
            public CacheEntryEventFilter<Integer, String> create() {
                return new CacheEntryEventFilter<Integer, String>() {

                    @Override
                    public boolean evaluate(CacheEntryEvent<? extends Integer, ? extends String> e) {
                        System.out.format("the value for key [%s] was updated from [%s] to [%s]\n", e.getKey(), e.getOldValue(), e.getValue());
                        return true;
                    }
                };
            }
        });
        // end::remoteFilter[]
        cache.query(qry);
        cache.put(1, "1");
    }
}