Java Row.getKey方法代码示例

import com.netflix.astyanax.model.Row; //导入方法依赖的package包/类
private Iterator<Map.Entry<String, StorageSummary>> decodeMetadataRows(
        final Iterator<Row<ByteBuffer, Composite>> rowIter, final AstyanaxTable table) {
    return new AbstractIterator<Map.Entry<String, StorageSummary>>() {
        @Override
        protected Map.Entry<String, StorageSummary> computeNext() {
            while (rowIter.hasNext()) {
                Row<ByteBuffer, Composite> row = rowIter.next();
                ByteBuffer key = row.getKey();
                ColumnList<Composite> columns = row.getColumns();

                String blobId = AstyanaxStorage.getContentKey(key);

                StorageSummary summary = toStorageSummary(columns);
                if (summary == null) {
                    continue;  // Partial blob, parts may still be replicating.
                }

                // Cleanup older versions of the blob, if any (unlikely).
                deleteOldColumns(table, blobId, columns, summary.getTimestamp());

                return Maps.immutableEntry(blobId, summary);
            }
            return endOfData();
        }
    };
}
 

import com.netflix.astyanax.model.Row; //导入方法依赖的package包/类
@Override
public Iterator<String> listQueues() {
    final Iterator<Row<String, UUID>> rowIter = execute(
            _keyspace.prepareQuery(CF_DEDUP_MD, ConsistencyLevel.CL_LOCAL_QUORUM)
                    .getAllRows()
                    .setRowLimit(100)
                    .withColumnRange(new RangeBuilder().setLimit(1).build()))
            .iterator();
    return new AbstractIterator<String>() {
        @Override
        protected String computeNext() {
            while (rowIter.hasNext()) {
                Row<String, UUID> row = rowIter.next();
                if (!row.getColumns().isEmpty()) {
                    return row.getKey();
                }
            }
            return endOfData();
        }
    };
}
 

import com.netflix.astyanax.model.Row; //导入方法依赖的package包/类
@Override
public Map<UUID, ByteBuffer> findMaxRecords(Collection<UUID> dataIds) {
    // Finding the max using a reversed column range shouldn't have to worry about skipping tombstones since
    // we always delete smaller column values before deleting larger column values--scanning will hit the max
    // before needing to skip over tombstones.
    Map<UUID, ByteBuffer> resultMap = Maps.newHashMap();
    for (List<UUID> batch : Iterables.partition(dataIds, 10)) {
        Rows<UUID, ByteBuffer> rows = execute(
                _keyspace.prepareQuery(CF_DEDUP_DATA, ConsistencyLevel.CL_LOCAL_QUORUM)
                        .getKeySlice(batch)
                        .withColumnRange(new RangeBuilder()
                                .setReversed(true)
                                .setLimit(1)
                                .build()));
        for (Row<UUID, ByteBuffer> row : rows) {
            UUID dataId = row.getKey();
            for (Column<ByteBuffer> column : row.getColumns()) {
                resultMap.put(dataId, column.getName());
            }
        }
    }
    return resultMap;
}
 

import com.netflix.astyanax.model.Row; //导入方法依赖的package包/类
@Override
public Iterator<String> listChannels() {
    final Iterator<Row<String, ByteBuffer>> rowIter = execute(
            _keyspace.prepareQuery(ColumnFamilies.MANIFEST, ConsistencyLevel.CL_LOCAL_QUORUM)
                    .getAllRows()
                    .setRowLimit(1000)
                    .withColumnRange(new RangeBuilder().setLimit(1).build()))
            .iterator();
    return new AbstractIterator<String>() {
        @Override
        protected String computeNext() {
            while (rowIter.hasNext()) {
                Row<String, ByteBuffer> row = rowIter.next();
                if (!row.getColumns().isEmpty()) {
                    return row.getKey();
                }
            }
            return endOfData();
        }
    };
}
 

import com.netflix.astyanax.model.Row; //导入方法依赖的package包/类
/**
 * Get the last update times of all of the script archives managed by this Repository.
 * @return map of moduleId to last update time
 */
@Override
public Map<ModuleId, Long> getArchiveUpdateTimes() throws IOException {
    Iterable<Row<String, String>> rows;
    try {
        rows = getRows((EnumSet<?>)EnumSet.of(Columns.module_id, Columns.last_update));
    } catch (Exception e) {
        throw new IOException(e);
    }
    Map<ModuleId, Long> updateTimes = new LinkedHashMap<ModuleId, Long>();
    for (Row<String, String> row : rows) {
        String moduleId = row.getKey();
        Column<String> lastUpdateColumn = row.getColumns().getColumnByName(Columns.last_update.name());
        Long updateTime = lastUpdateColumn != null ? lastUpdateColumn.getLongValue() : null;
        if (StringUtils.isNotBlank(moduleId) && updateTime != null) {
            updateTimes.put(ModuleId.fromString(moduleId), updateTime);
        }
    }
    return updateTimes;
}
 

import com.netflix.astyanax.model.Row; //导入方法依赖的package包/类
/**
 * Get a summary of all archives in this Repository
 * @return List of summaries
 */
@Override
public List<ArchiveSummary> getArchiveSummaries() throws IOException {
    List<ArchiveSummary> summaries = new LinkedList<ArchiveSummary>();
    Iterable<Row<String, String>> rows;
    try {
            rows = getRows((EnumSet<?>)EnumSet.of(Columns.module_id, Columns.last_update, Columns.module_spec));
    } catch (Exception e) {
        throw new IOException(e);
    }

    for (Row<String, String> row : rows) {
        String moduleId = row.getKey();
        ColumnList<String> columns = row.getColumns();
        Column<String> lastUpdateColumn = columns.getColumnByName(Columns.last_update.name());
        long updateTime = lastUpdateColumn != null ? lastUpdateColumn.getLongValue() : 0;
        ScriptModuleSpec moduleSpec = getModuleSpec(columns);
        ArchiveSummary summary = new ArchiveSummary(ModuleId.fromString(moduleId), moduleSpec, updateTime, null);
        summaries.add(summary);
    }
    return summaries;
}
 

import com.netflix.astyanax.model.Row; //导入方法依赖的package包/类
private Holder<com.alvazan.orm.api.z8spi.Row> fetchNext() {
	if(!iterator.hasNext())
		return null;

	Row<byte[], byte[]> row = iterator.next();
	byte[] key = row.getKey();

	com.alvazan.orm.api.z8spi.Row r = rowProvider.get();
	r.setKey(key);
	CassandraSession.processColumns(row, r);
	
	return new Holder<com.alvazan.orm.api.z8spi.Row>(r);
}
 

import com.netflix.astyanax.model.Row; //导入方法依赖的package包/类
private com.alvazan.orm.api.z8spi.iter.AbstractCursor.Holder<IndexColumn> fetchNext() {
	if(!iterator.hasNext())
		return null;
	
	Row<byte[], byte[]> row = iterator.next();
	byte[] key = row.getKey();
	
	IndexColumn col = new IndexColumn();
	col.setPrimaryKey(key);
	return new Holder<IndexColumn>(col);
}
 

import com.netflix.astyanax.model.Row; //导入方法依赖的package包/类
public AstyanaxResultSet(OperationResult<Rows<K, String>> result) {
	this.result = result;
	rows = result.getResult();
	this.rowIterator = rows.iterator();
	if (rowIterator.hasNext()) {
		Row<K, String> row = rowIterator.next();
		this.columns = row.getColumns();
		this.key = row.getKey();
	} else {
		this.columns = new EmptyColumnList<String>();
	}
}
 

import com.netflix.astyanax.model.Row; //导入方法依赖的package包/类
@Override
public void run() {
  if (families == null || families.length < 1) {
    deferred.callback(new UnsupportedOperationException(
        "Can't scan cassandra without a column family: " + this));
    return;
  }
  if (iterator == null) {
    try {
      final OperationResult<Rows<byte[], byte[]>> results = 
          keyspace.prepareQuery(client.getColumnFamilySchemas().get(families[0]))
        .withCaching(populate_blockcache)
        .getRowRange(start_key, stop_key, null, null, Integer.MAX_VALUE).execute();
      iterator = results.getResult().iterator();
    } catch (ConnectionException e) {
      deferred.callback(e);
      return;
    }
  }
  
  if (!iterator.hasNext()) {
    deferred.callback(null);
    //return Deferred.fromResult(null);
    return;
  }
  
  // dunno how to size this since we don't have the low level deets
  final ArrayList<ArrayList<KeyValue>> rows =
      new ArrayList<ArrayList<KeyValue>>();
  
  int kv_count = 0;
  while (rows.size() < max_num_rows && iterator.hasNext()) {
    final Row<byte[], byte[]> result = iterator.next();
    if (filter != null) {
      // TODO - post filtering SUCKS!!!!!
      final KeyRegexpFilter regex = (KeyRegexpFilter)filter;
      if (!regex.matches(result.getKey())) {
        continue;
      }
    }
    
    final ArrayList<KeyValue> row = new ArrayList<KeyValue>(result.getColumns().size());
    // TODO - iterator on the columns too so we can satisfy max kvs
    for (final Column<byte[]> column : result.getColumns()) {
      final KeyValue kv = new KeyValue(result.getKey(), families[0], 
          column.getName(), column.getTimestamp() / 1000, // micro to ms 
          column.getByteArrayValue());
      row.add(kv);
    }
    rows.add(row);
    kv_count += row.size();
  }
  deferred.callback(rows);
}
 

import com.netflix.astyanax.model.Row; //导入方法依赖的package包/类
@Override
public void nextResult() {
	Row<K, String> row = rowIterator.next();
	this.columns = row.getColumns();
	this.key = row.getKey();
}
 

import com.netflix.astyanax.model.Row; //导入方法依赖的package包/类
/**
 * Get all of the {@link ScriptArchive}s for the given set of moduleIds. Will perform the operation in batches
 * as specified by {@link CassandraArchiveRepositoryConfig#getArchiveFetchBatchSize()} and outputs the jar files in
 * the path specified by {@link CassandraArchiveRepositoryConfig#getArchiveOutputDirectory()}.
 *
 * @param moduleIds keys to search for
 * @return set of ScriptArchives retrieved from the database
 */
@Override
public Set<ScriptArchive> getScriptArchives(Set<ModuleId> moduleIds) throws IOException {
    Set<ScriptArchive> archives = new LinkedHashSet<ScriptArchive>(moduleIds.size()*2);
    Path archiveOuputDir = getConfig().getArchiveOutputDirectory();
    List<ModuleId> moduleIdList = new LinkedList<ModuleId>(moduleIds);
    int batchSize = getConfig().getArchiveFetchBatchSize();
    int start = 0;
    try {
        while (start < moduleIdList.size()) {
            int end = Math.min(moduleIdList.size(), start + batchSize);
            List<ModuleId> batchModuleIds = moduleIdList.subList(start, end);
            List<String> rowKeys = new ArrayList<String>(batchModuleIds.size());
            for (ModuleId batchModuleId:batchModuleIds) {
                rowKeys.add(batchModuleId.toString());
            }

            Rows<String, String> rows = cassandra.getRows(rowKeys.toArray(new String[0]));
            for (Row<String, String> row : rows) {
                String moduleId = row.getKey();
                ColumnList<String> columns = row.getColumns();
                Column<String> lastUpdateColumn = columns.getColumnByName(Columns.last_update.name());
                Column<String> hashColumn = columns.getColumnByName(Columns.archive_content_hash.name());
                Column<String> contentColumn = columns.getColumnByName(Columns.archive_content.name());
                if (lastUpdateColumn == null || hashColumn == null || contentColumn == null) {
                    continue;
                }
                ScriptModuleSpec moduleSpec = getModuleSpec(columns);
                long lastUpdateTime = lastUpdateColumn.getLongValue();
                byte[] hash = hashColumn.getByteArrayValue();
                byte[] content = contentColumn.getByteArrayValue();

                // verify the hash
                if (hash != null && hash.length > 0 && !verifyHash(hash, content)) {
                    logger.warn("Content hash validation failed for moduleId {}. size: {}", moduleId, content.length);
                    continue;
                }
                String fileName = new StringBuilder().append(moduleId).append("-").append(lastUpdateTime).append(".jar").toString();
                Path jarFile = archiveOuputDir.resolve(fileName);
                Files.write(jarFile, content);
                JarScriptArchive scriptArchive = new JarScriptArchive.Builder(jarFile)
                    .setModuleSpec(moduleSpec)
                    .setCreateTime(lastUpdateTime)
                    .build();
                archives.add(scriptArchive);
            }
            start = end;
        }
    } catch (Exception e) {
        throw new IOException(e);
    }
    return archives;
}