alexaClientSDK::avsCommon::utils::TestableAttachmentManager Class Reference

#include <TestableAttachmentManager.h>

Inheritance diagram for alexaClientSDK::avsCommon::utils::TestableAttachmentManager:

Collaboration diagram for alexaClientSDK::avsCommon::utils::TestableAttachmentManager:

Public Member Functions
	TestableAttachmentManager ()
std::string	generateAttachmentId (const std::string &contextId, const std::string &contentId) const override
bool	setAttachmentTimeoutMinutes (std::chrono::minutes timeoutMinutes) override
std::unique_ptr< avsCommon::avs::attachment::AttachmentWriter >	createWriter (const std::string &attachmentId, avsCommon::utils::sds::WriterPolicy policy) override
std::unique_ptr< avsCommon::avs::attachment::AttachmentReader >	createReader (const std::string &attachmentId, avsCommon::utils::sds::ReaderPolicy policy) override
Public Member Functions inherited from alexaClientSDK::avsCommon::avs::attachment::AttachmentManager
	AttachmentManager (AttachmentType attachmentType)
Public Member Functions inherited from alexaClientSDK::avsCommon::avs::attachment::AttachmentManagerInterface
virtual	~AttachmentManagerInterface ()=default

Additional Inherited Members
Public Types inherited from alexaClientSDK::avsCommon::avs::attachment::AttachmentManager
enum	AttachmentType { AttachmentType::IN_PROCESS }
Static Public Member Functions inherited from alexaClientSDK::avsCommon::avs::attachment::AttachmentManager
static std::shared_ptr< AttachmentManagerInterface >	createInProcessAttachmentManagerInterface ()
Static Public Attributes inherited from alexaClientSDK::avsCommon::avs::attachment::AttachmentManager
static constexpr std::chrono::minutes	ATTACHMENT_MANAGER_TIMOUT_MINUTES_DEFAULT = std::chrono::hours(12)
static constexpr std::chrono::minutes	ATTACHMENT_MANAGER_TIMOUT_MINUTES_MINIMUM = std::chrono::minutes(1)

Detailed Description

A version of the Decorator Pattern, this class allows us to return a special AttachmentWriter class to calling code, while routing all other functionality to a normal encapsulated AttachmentManager object.

Constructor & Destructor Documentation

TestableAttachmentManager()

alexaClientSDK::avsCommon::utils::TestableAttachmentManager::TestableAttachmentManager

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Constructor.

Member Function Documentation

createReader()

std::unique_ptr< AttachmentReader > alexaClientSDK::avsCommon::utils::TestableAttachmentManager::createReader ( const std::string &  attachmentId, avsCommon::utils::sds::ReaderPolicy  policy  )

overridevirtual

Returns a pointer to an AttachmentReader.

Note

Calls to createReader and createWriter may occur in any order.

Parameters

attachmentId	The id of the Attachment.
policy	The AttachmentReader policy, which determines the semantics of the AttachmentReader.read().

Returns

An AttachmentReader.

Reimplemented from alexaClientSDK::avsCommon::avs::attachment::AttachmentManager.

createWriter()

std::unique_ptr< AttachmentWriter > alexaClientSDK::avsCommon::utils::TestableAttachmentManager::createWriter ( const std::string &  attachmentId, avsCommon::utils::sds::WriterPolicy  policy  )

overridevirtual

Returns a pointer to an AttachmentWriter.

Note

Calls to createReader and createWriter may occur in any order.

Parameters

attachmentId	The id of the Attachment.
policy	The WriterPolicy that the AttachmentWriter should adhere to.

Returns

An AttachmentWriter.

Reimplemented from alexaClientSDK::avsCommon::avs::attachment::AttachmentManager.

generateAttachmentId()

std::string alexaClientSDK::avsCommon::utils::TestableAttachmentManager::generateAttachmentId ( const std::string &  contextId, const std::string &  contentId  ) const

overridevirtual

Creates an attachmentId given two particular strings - the contextId and the contentId. Generally, contextId allows disambiguation when two attachment contentIds are not guaranteed to be unique. This function provides a consistent way for different parts of application code to combine contextId and contentId into a single string. Clearly, both the reader and writer of a given attachment need to call this function with the same two strings.

As an example of usage, if an application has several sources of attachments, for example two audio providers, then one pair of contextId / contentId strings might be: { "AudioProvider1", "Attachment1" }. If the other audio provider creates an attachment, then the pair: { "AudioProvider2", "Attachment1" } allows the contextId to disambiguate what happens to be identical contentIds.

If this function is called with one or both strings being empty, then the combine will not be performed. In the case of both strings being empty, an empty string will be returned. If only one string is non-empty, then that string will be returned.

Parameters

contextId	The contextId, which generally reflects the source of the Attachment.
contentId	The contentId, which is considered unique when paired with a particular contextId.

Returns

The combined strings, which may be then used as a single attachmentId, per the logic outlined above.

Reimplemented from alexaClientSDK::avsCommon::avs::attachment::AttachmentManager.

setAttachmentTimeoutMinutes()

bool alexaClientSDK::avsCommon::utils::TestableAttachmentManager::setAttachmentTimeoutMinutes ( std::chrono::minutes  timeoutMinutes )

overridevirtual

Sets the timeout parameter which is used to ensure unused attachments are eventually cleaned up. This time is specified in minutes. An unused attachment is defined as an attachment for which only a reader or writer was created. Such an Attachment is waiting to be either produced or consumed.

If this function is not called, then the timeout is set to a default value specified by the implementation.

The timeout cannot be set lower than an implementation specific minimum, since too low a timeout could cause attachments to be removed before both reader and writer have had time to request it.

Parameters

timeoutMinutes

The timeout, expressed in minutes. If this is less than the minimum, then the setting will not be updated, and the function will return false.

Returns

Whether the timeout was set ok.

Reimplemented from alexaClientSDK::avsCommon::avs::attachment::AttachmentManager.

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The documentation for this class was generated from the following files:

• /workplace/avs-device-sdk/AVSCommon/Utils/test/AVSCommon/Utils/Common/TestableAttachmentManager.h
• /workplace/avs-device-sdk/AVSCommon/Utils/test/Common/TestableAttachmentManager.cpp