Java CQLStatement类代码示例

import org.apache.cassandra.cql3.CQLStatement; //导入依赖的package包/类
/**
 * Get the meta data (column definitions) for the target table.
 * 
 * @param query The CREATE TABLE statement for the table the Json data should be put into.
 * @return The table's meta data
 */
private static CFMetaData parseSchema(String query) {
    try {
        ClientState state = ClientState.forInternalCalls();
        ParsedStatement.Prepared prepared = QueryProcessor.getStatement(query, state);
        CQLStatement stmt = prepared.statement;
        stmt.validate(state);

        if (!stmt.getClass().equals(CreateTableStatement.class)) {
            throw new IllegalArgumentException("Invalid query, must be a CREATE TABLE statement");
        }

        return CreateTableStatement.class.cast(stmt).getCFMetaData();
    } catch (RequestValidationException | IllegalArgumentException e) {
        throw new RuntimeException(e);
    }
}
 

import org.apache.cassandra.cql3.CQLStatement; //导入依赖的package包/类
public ResultMessage processPrepared(CQLStatement statement,
                                     QueryState state,
                                     QueryOptions options,
                                     Map<String, ByteBuffer> customPayload)
                                             throws RequestExecutionException, RequestValidationException
{
    if (customPayload != null)
        requestPayload = customPayload;
    ResultMessage result = QueryProcessor.instance.processPrepared(statement, state, options, customPayload);
    if (customPayload != null)
    {
        result.setCustomPayload(responsePayload);
        responsePayload = null;
    }
    return result;
}
 

import org.apache.cassandra.cql3.CQLStatement; //导入依赖的package包/类
private static ResultSet.Metadata extractResultMetadata(CQLStatement statement)
{
    if (!(statement instanceof SelectStatement))
        return ResultSet.Metadata.EMPTY;

    return ((SelectStatement)statement).getResultMetadata();
}
 

import org.apache.cassandra.cql3.CQLStatement; //导入依赖的package包/类
private static ResultSet.ResultMetadata extractResultMetadata(CQLStatement statement)
{
    if (!(statement instanceof SelectStatement))
        return ResultSet.ResultMetadata.EMPTY;

    return ((SelectStatement)statement).getResultMetadata();
}
 

import org.apache.cassandra.cql3.CQLStatement; //导入依赖的package包/类
private void assertFunctions(CQLStatement stmt, String... function)
{
    Set<String> expected = com.google.common.collect.Sets.newHashSet(function);
    Set<String> actual = com.google.common.collect.Sets.newHashSet(Iterables.transform(stmt.getFunctions(),
                                                                                       toFunctionNames));
    assertTrue(com.google.common.collect.Sets.symmetricDifference(expected, actual).isEmpty());
}
 

import org.apache.cassandra.cql3.CQLStatement; //导入依赖的package包/类
public Message.Response execute(QueryState state)
{
    try
    {
        CQLStatement statement = QueryProcessor.getPrepared(statementId);

        if (statement == null)
            throw new PreparedQueryNotFoundException(statementId);

        UUID tracingId = null;
        if (isTracingRequested())
        {
            tracingId = UUIDGen.getTimeUUID();
            state.prepareTracingSession(tracingId);
        }

        if (state.traceNextQuery())
        {
            state.createTracingSession();
            // TODO we don't have [typed] access to CQL bind variables here.  CASSANDRA-4560 is open to add support.
            Tracing.instance().begin("Execute CQL3 prepared query", Collections.<String, String>emptyMap());
        }

        Message.Response response = QueryProcessor.processPrepared(statement, consistency, state, values);

        if (tracingId != null)
            response.setTracingId(tracingId);

        return response;
    }
    catch (Exception e)
    {
        return ErrorMessage.fromException(e);
    }
    finally
    {
        Tracing.instance().stopSession();
    }
}
 

import org.apache.cassandra.cql3.CQLStatement; //导入依赖的package包/类
protected Prepared(CQLStatement statement, List<ColumnSpecification> boundNames)
{
    this.statement = statement;
    this.boundNames = boundNames;
    this.rawCQLStatement = "";
}
 

import org.apache.cassandra.cql3.CQLStatement; //导入依赖的package包/类
public Message.Response execute(QueryState state)
{
    try
    {
        QueryHandler handler = state.getClientState().getCQLQueryHandler();
        ParsedStatement.Prepared prepared = handler.getPrepared(statementId);
        if (prepared == null)
            throw new PreparedQueryNotFoundException(statementId);

        options.prepare(prepared.boundNames);
        CQLStatement statement = prepared.statement;

        if (options.getPageSize() == 0)
            throw new ProtocolException("The page size cannot be 0");

        UUID tracingId = null;
        if (isTracingRequested())
        {
            tracingId = UUIDGen.getTimeUUID();
            state.prepareTracingSession(tracingId);
        }

        if (state.traceNextQuery())
        {
            state.createTracingSession();

            ImmutableMap.Builder<String, String> builder = ImmutableMap.builder();
            if (options.getPageSize() > 0)
                builder.put("page_size", Integer.toString(options.getPageSize()));

            // TODO we don't have [typed] access to CQL bind variables here.  CASSANDRA-4560 is open to add support.
            Tracing.instance.begin("Execute CQL3 prepared query", builder.build());
        }

        Message.Response response = handler.processPrepared(statement, state, options);
        if (options.skipMetadata() && response instanceof ResultMessage.Rows)
            ((ResultMessage.Rows)response).result.metadata.setSkipMetadata();

        if (tracingId != null)
            response.setTracingId(tracingId);

        return response;
    }
    catch (Exception e)
    {
        JVMStabilityInspector.inspectThrowable(e);
        return ErrorMessage.fromException(e);
    }
    finally
    {
        Tracing.instance.stopSession();
    }
}
 

import org.apache.cassandra.cql3.CQLStatement; //导入依赖的package包/类
public Message.Response execute(QueryState state)
{
    try
    {
        UUID tracingId = null;
        if (isTracingRequested())
        {
            tracingId = UUIDGen.getTimeUUID();
            state.prepareTracingSession(tracingId);
        }

        if (state.traceNextQuery())
        {
            state.createTracingSession();
            // TODO we don't have [typed] access to CQL bind variables here.  CASSANDRA-4560 is open to add support.
            Tracing.instance.begin("Execute batch of CQL3 queries", Collections.<String, String>emptyMap());
        }

        List<ModificationStatement> statements = new ArrayList<ModificationStatement>(queryOrIdList.size());
        for (int i = 0; i < queryOrIdList.size(); i++)
        {
            Object query = queryOrIdList.get(i);
            CQLStatement statement;
            if (query instanceof String)
            {
                statement = QueryProcessor.parseStatement((String)query, state);
            }
            else
            {
                statement = QueryProcessor.getPrepared((MD5Digest)query);
                if (statement == null)
                    throw new PreparedQueryNotFoundException((MD5Digest)query);
            }

            List<ByteBuffer> queryValues = values.get(i);
            if (queryValues.size() != statement.getBoundsTerms())
                throw new InvalidRequestException(String.format("There were %d markers(?) in CQL but %d bound variables",
                                                                statement.getBoundsTerms(),
                                                                queryValues.size()));
            if (!(statement instanceof ModificationStatement))
                throw new InvalidRequestException("Invalid statement in batch: only UPDATE, INSERT and DELETE statements are allowed.");

            ModificationStatement mst = (ModificationStatement)statement;
            if (mst.isCounter())
            {
                if (type != BatchStatement.Type.COUNTER)
                    throw new InvalidRequestException("Cannot include counter statement in a non-counter batch");
            }
            else
            {
                if (type == BatchStatement.Type.COUNTER)
                    throw new InvalidRequestException("Cannot include non-counter statement in a counter batch");
            }
            statements.add(mst);
        }

        // Note: It's ok at this point to pass a bogus value for the number of bound terms in the BatchState ctor
        // (and no value would be really correct, so we prefer passing a clearly wrong one).
        BatchStatement batch = new BatchStatement(-1, type, statements, Attributes.none());
        Message.Response response = QueryProcessor.processBatch(batch, consistency, state, values);

        if (tracingId != null)
            response.setTracingId(tracingId);

        return response;
    }
    catch (Exception e)
    {
        return ErrorMessage.fromException(e);
    }
    finally
    {
        Tracing.instance.stopSession();
    }
}
 

import org.apache.cassandra.cql3.CQLStatement; //导入依赖的package包/类
public Message.Response execute(QueryState state)
{
    try
    {
        CQLStatement statement = QueryProcessor.getPrepared(statementId);

        if (statement == null)
            throw new PreparedQueryNotFoundException(statementId);

        if (options.getPageSize() == 0)
            throw new ProtocolException("The page size cannot be 0");

        UUID tracingId = null;
        if (isTracingRequested())
        {
            tracingId = UUIDGen.getTimeUUID();
            state.prepareTracingSession(tracingId);
        }

        if (state.traceNextQuery())
        {
            state.createTracingSession();

            ImmutableMap.Builder<String, String> builder = ImmutableMap.builder();
            if (options.getPageSize() > 0)
                builder.put("page_size", Integer.toString(options.getPageSize()));

            // TODO we don't have [typed] access to CQL bind variables here.  CASSANDRA-4560 is open to add support.
            Tracing.instance.begin("Execute CQL3 prepared query", builder.build());
        }

        Message.Response response = QueryProcessor.processPrepared(statement, state, options);
        if (options.skipMetadata() && response instanceof ResultMessage.Rows)
            ((ResultMessage.Rows)response).result.metadata.setSkipMetadata();

        if (tracingId != null)
            response.setTracingId(tracingId);

        return response;
    }
    catch (Exception e)
    {
        return ErrorMessage.fromException(e);
    }
    finally
    {
        Tracing.instance.stopSession();
    }
}
 

import org.apache.cassandra.cql3.CQLStatement; //导入依赖的package包/类
public Message.Response execute(QueryState state)
{
    try
    {
        QueryHandler handler = ClientState.getCQLQueryHandler();
        ParsedStatement.Prepared prepared = handler.getPrepared(statementId);
        if (prepared == null)
            throw new PreparedQueryNotFoundException(statementId);

        options.prepare(prepared.boundNames);
        CQLStatement statement = prepared.statement;

        if (options.getPageSize() == 0)
            throw new ProtocolException("The page size cannot be 0");

        UUID tracingId = null;
        if (isTracingRequested())
        {
            tracingId = UUIDGen.getTimeUUID();
            state.prepareTracingSession(tracingId);
        }

        if (state.traceNextQuery())
        {
            state.createTracingSession();

            ImmutableMap.Builder<String, String> builder = ImmutableMap.builder();
            if (options.getPageSize() > 0)
                builder.put("page_size", Integer.toString(options.getPageSize()));
            if(options.getConsistency() != null)
                builder.put("consistency_level", options.getConsistency().name());
            if(options.getSerialConsistency() != null)
                builder.put("serial_consistency_level", options.getSerialConsistency().name());

            // TODO we don't have [typed] access to CQL bind variables here.  CASSANDRA-4560 is open to add support.
            Tracing.instance.begin("Execute CQL3 prepared query", state.getClientAddress(), builder.build());
        }

        // Some custom QueryHandlers are interested by the bound names. We provide them this information
        // by wrapping the QueryOptions.
        QueryOptions queryOptions = QueryOptions.addColumnSpecifications(options, prepared.boundNames);
        Message.Response response = handler.processPrepared(statement, state, queryOptions, getCustomPayload());
        if (options.skipMetadata() && response instanceof ResultMessage.Rows)
            ((ResultMessage.Rows)response).result.metadata.setSkipMetadata();

        if (tracingId != null)
            response.setTracingId(tracingId);

        return response;
    }
    catch (Exception e)
    {
        JVMStabilityInspector.inspectThrowable(e);
        return ErrorMessage.fromException(e);
    }
    finally
    {
        Tracing.instance.stopSession();
    }
}
 

import org.apache.cassandra.cql3.CQLStatement; //导入依赖的package包/类
private CQLStatement getStatement(String cql)
{
    return QueryProcessor.getStatement(cql, clientState).statement;
}
 

import org.apache.cassandra.cql3.CQLStatement; //导入依赖的package包/类
public Message.Response execute(QueryState state)
{
    try
    {
        QueryHandler handler = state.getClientState().getCQLQueryHandler();
        ParsedStatement.Prepared prepared = handler.getPrepared(statementId);
        if (prepared == null)
            throw new PreparedQueryNotFoundException(statementId);

        options.prepare(prepared.boundNames);
        CQLStatement statement = prepared.statement;

        if (options.getPageSize() == 0)
            throw new ProtocolException("The page size cannot be 0");

        UUID tracingId = null;
        if (isTracingRequested())
        {
            tracingId = UUIDGen.getTimeUUID();
            state.prepareTracingSession(tracingId);
        }

        if (state.traceNextQuery())
        {
            state.createTracingSession();

            ImmutableMap.Builder<String, String> builder = ImmutableMap.builder();
            if (options.getPageSize() > 0)
                builder.put("page_size", Integer.toString(options.getPageSize()));

            // TODO we don't have [typed] access to CQL bind variables here.  CASSANDRA-4560 is open to add support.
            Tracing.instance.begin("Execute CQL3 prepared query", builder.build());
        }

        Message.Response response = handler.processPrepared(statement, state, options);
        if (options.skipMetadata() && response instanceof ResultMessage.Rows)
            ((ResultMessage.Rows)response).result.metadata.setSkipMetadata();

        if (tracingId != null)
            response.setTracingId(tracingId);

        return response;
    }
    catch (Exception e)
    {
        return ErrorMessage.fromException(e);
    }
    finally
    {
        Tracing.instance.stopSession();
    }
}
 

import org.apache.cassandra.cql3.CQLStatement; //导入依赖的package包/类
public Message.Response execute(QueryState state)
{
    try
    {
        UUID tracingId = null;
        if (isTracingRequested())
        {
            tracingId = UUIDGen.getTimeUUID();
            state.prepareTracingSession(tracingId);
        }

        if (state.traceNextQuery())
        {
            state.createTracingSession();
            // TODO we don't have [typed] access to CQL bind variables here.  CASSANDRA-4560 is open to add support.
            Tracing.instance.begin("Execute batch of CQL3 queries", Collections.<String, String>emptyMap());
        }

        List<ModificationStatement> statements = new ArrayList<ModificationStatement>(queryOrIdList.size());
        for (int i = 0; i < queryOrIdList.size(); i++)
        {
            Object query = queryOrIdList.get(i);
            CQLStatement statement;
            if (query instanceof String)
            {
                statement = QueryProcessor.parseStatement((String)query, state);
            }
            else
            {
                statement = QueryProcessor.getPrepared((MD5Digest)query);
                if (statement == null)
                    throw new PreparedQueryNotFoundException((MD5Digest)query);
            }

            List<ByteBuffer> queryValues = values.get(i);
            if (queryValues.size() != statement.getBoundTerms())
                throw new InvalidRequestException(String.format("There were %d markers(?) in CQL but %d bound variables",
                                                                statement.getBoundTerms(),
                                                                queryValues.size()));
            if (!(statement instanceof ModificationStatement))
                throw new InvalidRequestException("Invalid statement in batch: only UPDATE, INSERT and DELETE statements are allowed.");

            ModificationStatement mst = (ModificationStatement)statement;
            if (mst.isCounter())
            {
                if (type != BatchStatement.Type.COUNTER)
                    throw new InvalidRequestException("Cannot include counter statement in a non-counter batch");
            }
            else
            {
                if (type == BatchStatement.Type.COUNTER)
                    throw new InvalidRequestException("Cannot include non-counter statement in a counter batch");
            }
            statements.add(mst);
        }

        // Note: It's ok at this point to pass a bogus value for the number of bound terms in the BatchState ctor
        // (and no value would be really correct, so we prefer passing a clearly wrong one).
        BatchStatement batch = new BatchStatement(-1, type, statements, Attributes.none());
        Message.Response response = QueryProcessor.processBatch(batch, consistency, state, values, queryOrIdList);

        if (tracingId != null)
            response.setTracingId(tracingId);

        return response;
    }
    catch (Exception e)
    {
        return ErrorMessage.fromException(e);
    }
    finally
    {
        Tracing.instance.stopSession();
    }
}
 

import org.apache.cassandra.cql3.CQLStatement; //导入依赖的package包/类
public Message.Response execute(QueryState state)
{
    try
    {
        QueryHandler handler = state.getClientState().getCQLQueryHandler();
        CQLStatement statement = handler.getPrepared(statementId);

        if (statement == null)
            throw new PreparedQueryNotFoundException(statementId);

        if (options.getPageSize() == 0)
            throw new ProtocolException("The page size cannot be 0");

        UUID tracingId = null;
        if (isTracingRequested())
        {
            tracingId = UUIDGen.getTimeUUID();
            state.prepareTracingSession(tracingId);
        }

        if (state.traceNextQuery())
        {
            state.createTracingSession();

            ImmutableMap.Builder<String, String> builder = ImmutableMap.builder();
            if (options.getPageSize() > 0)
                builder.put("page_size", Integer.toString(options.getPageSize()));

            // TODO we don't have [typed] access to CQL bind variables here.  CASSANDRA-4560 is open to add support.
            Tracing.instance.begin("Execute CQL3 prepared query", builder.build());
        }

        Message.Response response = handler.processPrepared(statement, state, options);
        if (options.skipMetadata() && response instanceof ResultMessage.Rows)
            ((ResultMessage.Rows)response).result.metadata.setSkipMetadata();

        if (tracingId != null)
            response.setTracingId(tracingId);

        return response;
    }
    catch (Exception e)
    {
        return ErrorMessage.fromException(e);
    }
    finally
    {
        Tracing.instance.stopSession();
    }
}