org.opencredo.esper
Interface EsperStatementOperations

All Known Implementing Classes:

EsperStatement

public interface EsperStatementOperations

Esper support the capability to 'pull' query filter results from a statement. This interface expresses the simplified Esper 'pull' query operations. For more information on 'pull' operations, see ://esper.codehaus.org /esper-3.3.0/doc/reference/en/html/api.html#api-receive-results

Author:

Russ Miles (russ.miles@opencredo.com)

See Also:

EsperStatement

Method Summary

<T> java.util.List<T>	concurrentSafeQuery(ParameterizedEsperRowMapper<T> rm) Performs a concurrency safe 'pull' to retrieve query filtered results from the esper statement.
<T> T	concurrentSafeQueryForObject(ParameterizedEsperRowMapper<T> rm) Performs a concurrency safe 'pull' to retrieve query filtered results from the esper statement.
<T> java.util.List<T>	concurrentUnsafeQuery(ParameterizedEsperRowMapper<T> rm) Performs a concurrency unsafe 'pull' (i.e.
<T> T	concurrentUnsafeQueryForObject(ParameterizedEsperRowMapper<T> rm) Performs a concurrency unsafe 'pull' (i.e.

Method Detail

concurrentSafeQueryForObject

<T> T concurrentSafeQueryForObject(ParameterizedEsperRowMapper<T> rm)

Performs a concurrency safe 'pull' to retrieve query filtered results from the esper statement. Be aware that this operation will lock the underlying esper statement resources while executing.

Parameters:

rm - the ParameterizedEsperRowMapper to use for result mapping

Returns:

the single mapped object

concurrentSafeQuery

<T> java.util.List<T> concurrentSafeQuery(ParameterizedEsperRowMapper<T> rm)

Performs a concurrency safe 'pull' to retrieve query filtered results from the esper statement. The supplied ParameterizedEsperRowMapper is then used to populate the objects that are then collected together and returned as a List.

Parameters:

rm - the ParameterizedEsperRowMapper to use for result mapping

Returns:

a list containing all the objects mapped from the query results

concurrentUnsafeQueryForObject

<T> T concurrentUnsafeQueryForObject(ParameterizedEsperRowMapper<T> rm)

Performs a concurrency unsafe 'pull' (i.e. should only be used in a single threaded environment) to retrieve a query filtered result from the esper statement. The supplied ParameterizedEsperRowMapper is then used to populate the object that is returned.

Parameters:

rm - the ParameterizedEsperRowMapper to use for result mapping

Returns:

the mapped object

concurrentUnsafeQuery

<T> java.util.List<T> concurrentUnsafeQuery(ParameterizedEsperRowMapper<T> rm)

Performs a concurrency unsafe 'pull' (i.e. should only be used in a single threaded environment) to retrieve query filtered results from the esper statement. The supplied ParameterizedEsperRowMapper is then used to populate the objects that are then collected together and returned as a List.

Parameters:

rm - the ParameterizedEsperRowMapper to use for result mapping

Returns:

a list containing all the objects mapped from the query results