modules/core/src/main/java/org/apache/ignite/internal/processors/cache/query/GridCacheLocalQueryManager.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.ignite.internal.processors.cache.query;

import java.util.Collection;
import java.util.List;
import org.apache.ignite.IgniteCheckedException;
import org.apache.ignite.IgniteException;
import org.apache.ignite.cluster.ClusterNode;
import org.apache.ignite.internal.cache.query.index.IndexQueryResultMeta;
import org.apache.ignite.internal.processors.query.GridQueryFieldMetadata;
import org.apache.ignite.internal.util.lang.GridCloseableIterator;
import org.jetbrains.annotations.Nullable;

import static org.apache.ignite.cache.CacheMode.LOCAL;

/**
 * Local query manager (for cache in LOCAL cache mode).
 */
public class GridCacheLocalQueryManager<K, V> extends GridCacheQueryManager<K, V> {
    /** {@inheritDoc} */
    @SuppressWarnings("unchecked")
    @Override protected boolean onPageReady(
        boolean loc,
        GridCacheQueryInfo qryInfo,
        IndexQueryResultMeta metadata,
        Collection<?> data,
        boolean finished, Throwable e) {
        GridCacheQueryFutureAdapter fut = qryInfo.localQueryFuture();

        assert fut != null;

        if (e != null)
            fut.onPage(null, null, null, e, true);
        else
            fut.onPage(null, metadata, data, null, finished);

        return true;
    }

    /** {@inheritDoc} */
    @Override protected boolean onFieldsPageReady(boolean loc,
        GridCacheQueryInfo qryInfo,
        @Nullable List<GridQueryFieldMetadata> metaData,
        @Nullable Collection<?> entities,
        @Nullable Collection<?> data,
        boolean finished,
        @Nullable Throwable e) {
        assert qryInfo != null;

        GridCacheLocalFieldsQueryFuture fut = (GridCacheLocalFieldsQueryFuture)qryInfo.localQueryFuture();

        assert fut != null;

        if (e != null)
            fut.onPage(null, null, null, e, true);
        else
            fut.onFieldsPage(null, metaData, data, null, finished);

        return true;
    }

    /** {@inheritDoc} */
    @Override public void start0() throws IgniteCheckedException {
        super.start0();

        assert cctx.config().getCacheMode() == LOCAL;
    }

    /** {@inheritDoc} */
    @Override public CacheQueryFuture<?> queryDistributed(GridCacheQueryBean qry, Collection<ClusterNode> nodes) {
        assert cctx.config().getCacheMode() == LOCAL;

        throw new IgniteException("Distributed queries are not available for local cache " +
            "(use 'CacheQuery.execute(grid.forLocal())' instead) [cacheName=" + cctx.name() + ']');
    }

    /** {@inheritDoc} */
    @Override public GridCloseableIterator scanQueryDistributed(GridCacheQueryAdapter qry,
        Collection<ClusterNode> nodes) throws IgniteCheckedException {
        assert cctx.isLocal() : cctx.name();

        throw new IgniteException("Distributed scan query are not available for local cache " +
            "(use 'CacheQuery.executeScanQuery(grid.forLocal())' instead) [cacheName=" + cctx.name() + ']');
    }

    /** {@inheritDoc} */
    @Override public CacheQueryFuture<?> queryFieldsLocal(GridCacheQueryBean qry) {
        assert cctx.config().getCacheMode() == LOCAL;

        if (log.isDebugEnabled())
            log.debug("Executing query on local node: " + qry);

        GridCacheLocalFieldsQueryFuture fut = new GridCacheLocalFieldsQueryFuture(cctx, qry);

        try {
            qry.query().validate();

            fut.execute();
        }
        catch (IgniteCheckedException e) {
            fut.onDone(e);
        }

        return fut;
    }

    /** {@inheritDoc} */
    @Override public CacheQueryFuture<?> queryFieldsDistributed(GridCacheQueryBean qry,
        Collection<ClusterNode> nodes) {
        assert cctx.config().getCacheMode() == LOCAL;

        throw new IgniteException("Distributed queries are not available for local cache " +
            "(use 'CacheQuery.execute(grid.forLocal())' instead) [cacheName=" + cctx.name() + ']');
    }
}