Package net.esper.eql.db

Database SQL polling views and caches

See:
Description

Interface Summary

DatabaseConfigService	Service providing database connection factory and configuration information for use with historical data polling.
DatabaseConnectionFactory	Factory for new database connections.
DataCache	Implementations serve as caches for historical or reference data retrieved via lookup keys consisting or one or more rows represented by a list of events.
PollExecStrategy	Interface for polling data from a data source such as a relational database.

Class Summary

ColumnSettings	Column-level configuration settings are held in this immutable descriptor.
ConnectionCache	Base class for a Connection and PreparedStatement cache.
ConnectionCacheImpl	Caches the Connection and PreparedStatement instance for reuse.
ConnectionNoCacheImpl	Implementation of a connection cache that simply doesn't cache but gets a new connection and statement every request, and closes these every time a client indicates done.
DatabaseConfigServiceImpl	Implementation provides database instance services such as connection factory and connection settings.
DatabaseDMConnFactory	Database connection factory using DriverManager to obtain connections.
DatabaseDSConnFactory	Database connection factory using InitialContext and DataSource to obtain connections.
DatabasePollingViewable	Implements a poller viewable that uses a polling strategy, a cache and some input parameters extracted from event streams to perform the polling.
DatabasePollingViewableFactory	Factory for a view onto historical data via SQL statement.
DataCacheExpiringImpl	Implements an expiry-time cache that evicts data when data becomes stale after a given number of seconds.
DataCacheFactory	Factory for data caches for use caching database query results and method invocation results.
DataCacheLRUImpl	Query result data cache implementation that uses a least-recently-used algorithm to store and evict query results.
DataCacheNullImpl	Null implementation for a data cache that doesn't ever hit.
DBOutputTypeDesc	Descriptor for SQL output columns.
PollExecStrategyDBQuery	Viewable providing historical data from a database.
QueryMetaData	Holder for query meta data information obtained from interrogating statements.
SQLParameterDesc	Hold a raw SQL-statements parameter information that were specified in the form ${name}.

Exception Summary

DatabaseConfigException

Exception to indicate that a stream name could not be resolved.

Package net.esper.eql.db Description

Database SQL polling views and caches