org.apache.nifi.reporting.sql

Class MetricsSqlQueryService

java.lang.Object

org.apache.nifi.reporting.sql.MetricsSqlQueryService

All Implemented Interfaces:

MetricsQueryService

public class MetricsSqlQueryService
extends Object
implements MetricsQueryService

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private class	MetricsSqlQueryService.PreparedStatementException

Field Summary

Fields

Modifier and Type	Field and Description
private int	defaultPrecision
private int	defaultScale
private ComponentLog	logger
private com.github.benmanes.caffeine.cache.Cache<String,BlockingQueue<CachedStatement>>	statementQueues

Constructor Summary

Constructors

Constructor and Description
MetricsSqlQueryService(ComponentLog logger, int defaultPrecision, int defaultScale)

Method Summary

Modifier and Type	Method and Description
private CachedStatement	buildCachedStatement(String sql, ReportingContext context)
private void	clearQueue(BlockingQueue<CachedStatement> statementQueue)
void	closeQuietly(AutoCloseable... closeables)
private org.apache.calcite.jdbc.CalciteConnection	createConnection()
private org.apache.calcite.schema.SchemaPlus	createRootSchema(org.apache.calcite.jdbc.CalciteConnection calciteConnection)
ComponentLog	getLogger()
ResultSetRecordSet	getResultSetRecordSet(QueryResult queryResult)
private CachedStatement	getStatement(String sql, Supplier<CachedStatement> statementBuilder, com.github.benmanes.caffeine.cache.Cache<String,BlockingQueue<CachedStatement>> statementQueues)
private void	onCacheEviction(String key, BlockingQueue<CachedStatement> queue, com.github.benmanes.caffeine.cache.RemovalCause cause)
QueryResult	query(ReportingContext context, String sql)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

logger

private final ComponentLog logger

defaultPrecision

private final int defaultPrecision

defaultScale

private final int defaultScale

statementQueues

private final com.github.benmanes.caffeine.cache.Cache<String,BlockingQueue<CachedStatement>> statementQueues

Constructor Detail

MetricsSqlQueryService

public MetricsSqlQueryService(ComponentLog logger,
                              int defaultPrecision,
                              int defaultScale)

Method Detail

getLogger

public ComponentLog getLogger()

query

public QueryResult query(ReportingContext context,
                         String sql)
                  throws Exception

Specified by:

query in interface MetricsQueryService

Throws:

Exception

getResultSetRecordSet

public ResultSetRecordSet getResultSetRecordSet(QueryResult queryResult)
                                         throws Exception

Specified by:

getResultSetRecordSet in interface MetricsQueryService

Throws:

Exception

getStatement

private CachedStatement getStatement(String sql,
                                     Supplier<CachedStatement> statementBuilder,
                                     com.github.benmanes.caffeine.cache.Cache<String,BlockingQueue<CachedStatement>> statementQueues)

buildCachedStatement

private CachedStatement buildCachedStatement(String sql,
                                             ReportingContext context)
                                      throws Exception

Throws:

Exception

createRootSchema

private org.apache.calcite.schema.SchemaPlus createRootSchema(org.apache.calcite.jdbc.CalciteConnection calciteConnection)

createConnection

private org.apache.calcite.jdbc.CalciteConnection createConnection()

clearQueue

private void clearQueue(BlockingQueue<CachedStatement> statementQueue)

closeQuietly

public void closeQuietly(AutoCloseable... closeables)

Specified by:

closeQuietly in interface MetricsQueryService

onCacheEviction

private void onCacheEviction(String key,
                             BlockingQueue<CachedStatement> queue,
                             com.github.benmanes.caffeine.cache.RemovalCause cause)