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Berkeley DB .NET API Documentation
QueueDatabase..::.Consume Method (Boolean, Transaction)
QueueDatabase Class See Also Send Feedback

Return the record number and data from the available record closest to the head of the queue, and delete the record.

Namespace: BerkeleyDB
Assembly: libdb_dotnet53 (in libdb_dotnet53.dll) Version: 5.3.28.0

# Syntax

C#

    public KeyValuePair<uint, DatabaseEntry> Consume(
    	bool wait,
    	Transaction txn
    )

Visual Basic (Declaration)

    Public Function Consume ( _
    	wait As Boolean, _
    	txn As Transaction _
    ) As KeyValuePair(Of UInteger, DatabaseEntry)

Visual C++

    public:
    KeyValuePair<unsigned int, DatabaseEntry^> Consume(
    	bool wait,
    	Transaction^ txn
    )

#### Parameters

wait
  Type: System..::.Boolean
  If true and the Queue database is empty, the thread of control will wait until there is data in the queue before returning.

txn
  Type: BerkeleyDB..::.Transaction
  txn is a Transaction object returned from BeginTransaction()()(); if the operation is part of a Berkeley DB Concurrent Data Store group, txn is a handle returned from BeginCDSGroup()()(); otherwise null.

#### Return Value

A KeyValuePair<(Of <(TKey, TValue>)>) whose Key parameter is the record number and whose Value parameter is the retrieved data.

# Exceptions

Exception | Condition
--- | ---
BerkeleyDB..::.LockNotGrantedException | If lock or transaction timeouts have been specified, a LockNotGrantedException may be thrown. This failure, by itself, does not require the enclosing transaction be aborted.

# See Also

QueueDatabase Class
Consume Overload
BerkeleyDB Namespace