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Java CassandraHelper類代碼示例

本文整理匯總了Java中com.thinkaurelius.titan.diskstorage.cassandra.utils.CassandraHelper類的典型用法代碼示例。如果您正苦於以下問題：Java CassandraHelper類的具體用法？Java CassandraHelper怎麽用？Java CassandraHelper使用的例子？那麽, 這裏精選的類代碼示例或許可以為您提供幫助。


CassandraHelper類屬於com.thinkaurelius.titan.diskstorage.cassandra.utils包，在下文中一共展示了CassandraHelper類的10個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。

示例1: getEntries

import com.thinkaurelius.titan.diskstorage.cassandra.utils.CassandraHelper; //導入依賴的package包/類
@Override
public RecordIterator<Entry> getEntries() {
    ensureOpen();

    if (sliceQuery == null)
        throw new IllegalStateException("getEntries() requires SliceQuery to be set.");

    return new RecordIterator<Entry>() {
        private final Iterator<Entry> columns =
                CassandraHelper.makeEntryIterator(currentRow.getColumns(),
                        entryGetter,
                        sliceQuery.getSliceEnd(),sliceQuery.getLimit());

        @Override
        public boolean hasNext() {
            ensureOpen();
            return columns.hasNext();
        }

        @Override
        public Entry next() {
            ensureOpen();
            return columns.next();
        }

        @Override
        public void close() {
            isClosed = true;
        }

        @Override
        public void remove() {
            throw new UnsupportedOperationException();
        }
    };
}
開發者ID:graben1437，項目名稱:titan1withtp3.1，代碼行數:37，代碼來源:AstyanaxKeyColumnValueStore.java

示例2: getEntries

import com.thinkaurelius.titan.diskstorage.cassandra.utils.CassandraHelper; //導入依賴的package包/類
@Override
public RecordIterator<Entry> getEntries() {
    ensureOpen();

    if (sliceQuery == null)
        throw new IllegalStateException("getEntries() requires SliceQuery to be set.");

    return new RecordIterator<Entry>() {
        final Iterator<Entry> columns = CassandraHelper.makeEntryIterator(
                Iterables.filter(currentRow.cf.getSortedColumns(), new FilterDeletedColumns(nowMillis)),
                entryGetter,
                sliceQuery.getSliceEnd(),
                sliceQuery.getLimit());

         //cfToEntries(currentRow.cf, sliceQuery).iterator();

        @Override
        public boolean hasNext() {
            ensureOpen();
            return columns.hasNext();
        }

        @Override
        public Entry next() {
            ensureOpen();
            return columns.next();
        }

        @Override
        public void close() {
            isClosed = true;
        }

        @Override
        public void remove() {
            throw new UnsupportedOperationException();
        }
    };

}
開發者ID:graben1437，項目名稱:titan1withtp3.1，代碼行數:41，代碼來源:CassandraEmbeddedKeyColumnValueStore.java

示例3: getLocalKeyPartition

import com.thinkaurelius.titan.diskstorage.cassandra.utils.CassandraHelper; //導入依賴的package包/類
public List<KeyRange> getLocalKeyPartition() throws BackendException {
    ensureKeyspaceExists(keySpaceName);

    @SuppressWarnings("rawtypes")
    Collection<Range<Token>> ranges = StorageService.instance.getPrimaryRanges(keySpaceName);

    List<KeyRange> keyRanges = new ArrayList<KeyRange>(ranges.size());

    for (@SuppressWarnings("rawtypes") Range<Token> range : ranges) {
        keyRanges.add(CassandraHelper.transformRange(range));
    }

    return keyRanges;
}
開發者ID:graben1437，項目名稱:titan1withtp3.1，代碼行數:15，代碼來源:CassandraEmbeddedStoreManager.java

示例4: getEntries

import com.thinkaurelius.titan.diskstorage.cassandra.utils.CassandraHelper; //導入依賴的package包/類
@Override
public RecordIterator<Entry> getEntries() {
    ensureOpen();

    return new RecordIterator<Entry>() {
        final Iterator<Entry> columns =
                CassandraHelper.makeEntryIterator(mostRecentRow.getColumns(),
                        entryGetter, columnSlice.getSliceEnd(),
                        columnSlice.getLimit());

        @Override
        public boolean hasNext() {
            ensureOpen();
            return columns.hasNext();
        }

        @Override
        public Entry next() {
            ensureOpen();
            return columns.next();
        }

        @Override
        public void close() {
            closeIterator();
        }

        @Override
        public void remove() {
            throw new UnsupportedOperationException();
        }
    };
}
開發者ID:graben1437，項目名稱:titan1withtp3.1，代碼行數:34，代碼來源:CassandraThriftKeyColumnValueStore.java

示例5: getLocalKeyPartition

import com.thinkaurelius.titan.diskstorage.cassandra.utils.CassandraHelper; //導入依賴的package包/類
@Override
public List<KeyRange> getLocalKeyPartition() throws BackendException {
    CTConnection conn = null;
    IPartitioner partitioner = getCassandraPartitioner();

    // DAVID CASSANDRA
    // if (!(partitioner instanceof AbstractByteOrderedPartitioner))
    if (!(partitioner instanceof ByteOrderedPartitioner))
        throw new UnsupportedOperationException("getLocalKeyPartition() only supported by byte ordered partitioner.");

    Token.TokenFactory tokenFactory = partitioner.getTokenFactory();

    try {
        // Resist the temptation to describe SYSTEM_KS.  It has no ring.
        // Instead, we'll create our own keyspace (or check that it exists), then describe it.
        ensureKeyspaceExists(keySpaceName);

        conn = pool.borrowObject(keySpaceName);
        List<TokenRange> ranges  = conn.getClient().describe_ring(keySpaceName);
        List<KeyRange> keyRanges = new ArrayList<KeyRange>(ranges.size());

        for (TokenRange range : ranges) {
            if (!NetworkUtil.hasLocalAddress(range.endpoints))
                continue;

            keyRanges.add(CassandraHelper.transformRange(tokenFactory.fromString(range.start_token), tokenFactory.fromString(range.end_token)));
        }

        return keyRanges;
    } catch (Exception e) {
        throw CassandraThriftKeyColumnValueStore.convertException(e);
    } finally {
        pool.returnObjectUnsafe(keySpaceName, conn);
    }
}
開發者ID:graben1437，項目名稱:titan1withtp3.1，代碼行數:36，代碼來源:CassandraThriftStoreManager.java

示例6: getLocalKeyPartition

import com.thinkaurelius.titan.diskstorage.cassandra.utils.CassandraHelper; //導入依賴的package包/類
@Override
public List<KeyRange> getLocalKeyPartition() throws BackendException {
    CTConnection conn = null;
    IPartitioner partitioner = getCassandraPartitioner();

    if (!(partitioner instanceof AbstractByteOrderedPartitioner))
        throw new UnsupportedOperationException("getLocalKeyPartition() only supported by byte ordered partitioner.");

    Token.TokenFactory tokenFactory = partitioner.getTokenFactory();

    try {
        // Resist the temptation to describe SYSTEM_KS.  It has no ring.
        // Instead, we'll create our own keyspace (or check that it exists), then describe it.
        ensureKeyspaceExists(keySpaceName);

        conn = pool.borrowObject(keySpaceName);
        List<TokenRange> ranges  = conn.getClient().describe_ring(keySpaceName);
        List<KeyRange> keyRanges = new ArrayList<KeyRange>(ranges.size());

        for (TokenRange range : ranges) {
            if (!NetworkUtil.hasLocalAddress(range.endpoints))
                continue;

            keyRanges.add(CassandraHelper.transformRange(tokenFactory.fromString(range.start_token), tokenFactory.fromString(range.end_token)));
        }

        return keyRanges;
    } catch (Exception e) {
        throw CassandraThriftKeyColumnValueStore.convertException(e);
    } finally {
        pool.returnObjectUnsafe(keySpaceName, conn);
    }
}
開發者ID:graben1437，項目名稱:titan1.0.1.kafka，代碼行數:34，代碼來源:CassandraThriftStoreManager.java

示例7: getLocalKeyPartition

import com.thinkaurelius.titan.diskstorage.cassandra.utils.CassandraHelper; //導入依賴的package包/類
public List<KeyRange> getLocalKeyPartition() throws BackendException {
    @SuppressWarnings("rawtypes")
    Collection<Range<Token>> ranges = StorageService.instance.getLocalPrimaryRanges(keySpaceName);
    List<KeyRange> keyRanges = new ArrayList<KeyRange>(ranges.size());

    for (@SuppressWarnings("rawtypes") Range<Token> range : ranges) {
        keyRanges.add(CassandraHelper.transformRange(range));
    }

    return keyRanges;
}
開發者ID:graben1437，項目名稱:titan0.5.4-hbase1.1.1-custom，代碼行數:12，代碼來源:CassandraEmbeddedStoreManager.java

示例8: getLocalKeyPartition

import com.thinkaurelius.titan.diskstorage.cassandra.utils.CassandraHelper; //導入依賴的package包/類
@Override
public List<KeyRange> getLocalKeyPartition() throws BackendException {
    CTConnection conn = null;
    IPartitioner<?> partitioner = getCassandraPartitioner();

    if (!(partitioner instanceof AbstractByteOrderedPartitioner))
        throw new UnsupportedOperationException("getLocalKeyPartition() only supported by byte ordered partitioner.");

    Token.TokenFactory tokenFactory = partitioner.getTokenFactory();

    try {
        conn = pool.borrowObject(keySpaceName);
        List<TokenRange> ranges  = conn.getClient().describe_ring(keySpaceName);
        List<KeyRange> keyRanges = new ArrayList<KeyRange>(ranges.size());

        for (TokenRange range : ranges) {
            if (!NetworkUtil.hasLocalAddress(range.endpoints))
                continue;

            keyRanges.add(CassandraHelper.transformRange(tokenFactory.fromString(range.start_token), tokenFactory.fromString(range.end_token)));
        }

        return keyRanges;
    } catch (Exception e) {
        throw CassandraThriftKeyColumnValueStore.convertException(e);
    } finally {
        pool.returnObjectUnsafe(keySpaceName, conn);
    }
}
開發者ID:graben1437，項目名稱:titan0.5.4-hbase1.1.1-custom，代碼行數:30，代碼來源:CassandraThriftStoreManager.java

示例9: getSlice

import com.thinkaurelius.titan.diskstorage.cassandra.utils.CassandraHelper; //導入依賴的package包/類
@Override
public EntryList getSlice(KeySliceQuery query, StoreTransaction txh) throws BackendException {

    /**
     * This timestamp mimics the timestamp used by
     * {@link org.apache.cassandra.thrift.CassandraServer#get(ByteBuffer,ColumnPath,ConsistencyLevel)}.
     *
     * That method passes the server's System.currentTimeMillis() to
     * {@link ReadCommand#create(String, ByteBuffer, String, long, IDiskAtomFilter)}.
     * {@code create(...)} in turn passes that timestamp to the SliceFromReadCommand constructor.
     */
    final long nowMillis = times.getTime().toEpochMilli();
    Composite startComposite = CellNames.simpleDense(query.getSliceStart().asByteBuffer());
    Composite endComposite = CellNames.simpleDense(query.getSliceEnd().asByteBuffer());
    SliceQueryFilter sqf = new SliceQueryFilter(startComposite, endComposite,
            false, query.getLimit() + (query.hasLimit()?1:0));
    ReadCommand sliceCmd = new SliceFromReadCommand(keyspace, query.getKey().asByteBuffer(), columnFamily, nowMillis, sqf);

    List<Row> slice = read(sliceCmd, getTx(txh).getReadConsistencyLevel().getDB());

    if (null == slice || 0 == slice.size())
        return EntryList.EMPTY_LIST;

    int sliceSize = slice.size();
    if (1 < sliceSize)
        throw new PermanentBackendException("Received " + sliceSize + " rows for single key");

    Row r = slice.get(0);

    if (null == r) {
        log.warn("Null Row object retrieved from Cassandra StorageProxy");
        return EntryList.EMPTY_LIST;
    }

    ColumnFamily cf = r.cf;

    if (null == cf) {
        log.debug("null ColumnFamily (\"{}\")", columnFamily);
        return EntryList.EMPTY_LIST;
    }

    if (cf.isMarkedForDelete())
        return EntryList.EMPTY_LIST;

    return CassandraHelper.makeEntryList(
            Iterables.filter(cf.getSortedColumns(), new FilterDeletedColumns(nowMillis)),
            entryGetter,
            query.getSliceEnd(),
            query.getLimit());

}
開發者ID:graben1437，項目名稱:titan1withtp3.1，代碼行數:52，代碼來源:CassandraEmbeddedKeyColumnValueStore.java

示例10: getSlice

import com.thinkaurelius.titan.diskstorage.cassandra.utils.CassandraHelper; //導入依賴的package包/類
@Override
public EntryList getSlice(KeySliceQuery query, StoreTransaction txh) throws BackendException {

    /**
     * This timestamp mimics the timestamp used by
     * {@link org.apache.cassandra.thrift.CassandraServer#get(ByteBuffer,ColumnPath,ConsistencyLevel)}.
     *
     * That method passes the server's System.currentTimeMillis() to
     * {@link ReadCommand#create(String, ByteBuffer, String, long, IDiskAtomFilter)}.
     * {@code create(...)} in turn passes that timestamp to the SliceFromReadCommand constructor.
     */
    final long nowMillis = times.getTime().getTimestamp(TimeUnit.MILLISECONDS);
    SliceQueryFilter sqf = new SliceQueryFilter(query.getSliceStart().asByteBuffer(), query.getSliceEnd().asByteBuffer(), false, query.getLimit() + (query.hasLimit()?1:0));
    ReadCommand sliceCmd = new SliceFromReadCommand(keyspace, query.getKey().asByteBuffer(), columnFamily, nowMillis, sqf);

    List<Row> slice = read(sliceCmd, getTx(txh).getReadConsistencyLevel().getDB());

    if (null == slice || 0 == slice.size())
        return EntryList.EMPTY_LIST;

    int sliceSize = slice.size();
    if (1 < sliceSize)
        throw new PermanentBackendException("Received " + sliceSize + " rows for single key");

    Row r = slice.get(0);

    if (null == r) {
        log.warn("Null Row object retrieved from Cassandra StorageProxy");
        return EntryList.EMPTY_LIST;
    }

    ColumnFamily cf = r.cf;

    if (null == cf) {
        log.debug("null ColumnFamily (\"{}\")", columnFamily);
        return EntryList.EMPTY_LIST;
    }

    if (cf.isMarkedForDelete())
        return EntryList.EMPTY_LIST;

    return CassandraHelper.makeEntryList(
            Iterables.filter(cf.getSortedColumns(), new FilterDeletedColumns(nowMillis)),
            entryGetter,
            query.getSliceEnd(),
            query.getLimit());

}
開發者ID:graben1437，項目名稱:titan0.5.4-hbase1.1.1-custom，代碼行數:49，代碼來源:CassandraEmbeddedKeyColumnValueStore.java


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