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Hypertable::OperationGatherStatistics Class Reference

Gathers and processes RangeServer statistics. More...

#include <OperationGatherStatistics.h>

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Public Member Functions

 OperationGatherStatistics (ContextPtr &context)
 Constructor. More...
 
virtual ~OperationGatherStatistics ()
 Destructor. More...
 
virtual void execute ()
 Carries out "gather statistics operation. More...
 
virtual const String name ()
 Name of operation used for exclusivity. More...
 
virtual const String label ()
 Human readable label for operation. More...
 
virtual bool exclusive ()
 Indicates if operation is exclusive. More...
 
virtual void display_state (std::ostream &os)
 Write human readable operation state to output stream. More...
 
- Public Member Functions inherited from Hypertable::OperationEphemeral
 OperationEphemeral (ContextPtr &context, int32_t type)
 Constructor with operation type specifier. More...
 
 OperationEphemeral (ContextPtr &context, EventPtr &event, int32_t type)
 Constructor with request Event and operation type specifier. More...
 
 OperationEphemeral (ContextPtr &context, const MetaLog::EntityHeader &header_)
 Constructor with MetaLog::EntityHeader. More...
 
virtual ~OperationEphemeral ()
 Destructor. More...
 
size_t encoded_length_state () const override
 Encoded length of operation state. More...
 
void encode_state (uint8_t **bufp) const override
 Encode operation state. More...
 
void decode_state (uint8_t version, const uint8_t **bufp, size_t *remainp) override
 Decode operation state. More...
 
void decode_state_old (uint8_t version, const uint8_t **bufp, size_t *remainp) override
 Decode operation state. More...
 
uint8_t encoding_version_state () const override
 Returns version of encoding format. More...
 
- Public Member Functions inherited from Hypertable::Operation
 Operation (ContextPtr &context, int32_t type)
 Constructor with operation type specifier. More...
 
 Operation (ContextPtr &context, EventPtr &event, int32_t type)
 Constructor with request Event and operation type specifier. More...
 
 Operation (ContextPtr &context, const MetaLog::EntityHeader &header_)
 Constructor with MetaLog::EntityHeader. More...
 
virtual ~Operation ()
 Destructor. More...
 
virtual const String graphviz_label ()
 Human readable operation label used in graphviz output. More...
 
virtual size_t encoded_result_length () const
 Length of encoded operation result. More...
 
virtual void encode_result (uint8_t **bufp) const
 Encode operation result. More...
 
virtual void decode_result (const uint8_t **bufp, size_t *remainp)
 Decode operation result. More...
 
void decode (const uint8_t **bufp, size_t *remainp, uint16_t definition_version) override
 Decode operation. More...
 
void display (std::ostream &os) override
 Write human readable string represenation of operation to output stream. More...
 
int64_t id ()
 Operation identifier. More...
 
ClockT::time_point expiration_time ()
 Returns operation expiration time. More...
 
void set_remove_approval_mask (uint16_t mask)
 Sets the remove approvals bit mask. More...
 
uint16_t get_remove_approval_mask ()
 Gets the remove approvals bit mask. More...
 
bool remove_approval_add (uint16_t approval)
 Sets remove approval bits. More...
 
bool removal_approved ()
 Checks if all remove approvals have been received. More...
 
void record_state (std::vector< MetaLog::EntityPtr > &additional)
 Records operation state and additional entities to the MML. More...
 
void record_state ()
 Records operation state to the MML. More...
 
void complete_error (int error, const String &msg, std::vector< MetaLog::EntityPtr > &additional)
 Completes operation with error. More...
 
void complete_error (int error, const String &msg, MetaLog::EntityPtr additional=MetaLog::EntityPtr())
 Completes operation with error. More...
 
void complete_error (Exception &e, std::vector< MetaLog::EntityPtr > &additional)
 Completes operation with exception. More...
 
void complete_error (Exception &e, MetaLog::EntityPtr additional=MetaLog::EntityPtr())
 Completes operation with exception. More...
 
void complete_ok (std::vector< MetaLog::EntityPtr > &additional)
 
void complete_ok (MetaLog::EntityPtr additional=MetaLog::EntityPtr())
 
virtual int64_t hash_code () const
 
virtual void exclusivities (DependencySet &exclusivities)
 
virtual void dependencies (DependencySet &dependencies)
 
virtual void obstructions (DependencySet &obstructions)
 
void add_exclusivity (const String &exclusivity)
 
void add_dependency (const String &dependency)
 
void add_obstruction (const String &obstruction)
 
void add_obstruction_permanent (const String &obstruction)
 
void fetch_sub_operations (std::vector< std::shared_ptr< Operation > > &sub_ops)
 
void pre_run ()
 
void post_run ()
 
int32_t get_state ()
 
void set_state (int32_t state)
 
virtual bool is_perpetual ()
 
bool block ()
 
bool unblock ()
 
bool is_blocked ()
 
bool is_complete ()
 
int32_t get_original_type ()
 
void set_original_type (int32_t original_type)
 
void set_ephemeral ()
 Sets the ephemeral flag to true. More...
 
bool ephemeral ()
 Gets the ephemeral flag. More...
 
int32_t get_error ()
 Get error code. More...
 
String get_error_msg ()
 Get error message. More...
 
- Public Member Functions inherited from Hypertable::MetaLog::Entity
 Entity (int32_t type)
 Constructor from entity type. More...
 
 Entity (const EntityHeader &header_)
 Constructor from entity header. More...
 
virtual ~Entity ()
 Destructor. More...
 
void lock ()
 Locks the entity's mutex. More...
 
void unlock ()
 Unlocks the entity's mutex. More...
 
void mark_for_removal ()
 Marks entity for removal. More...
 
bool marked_for_removal ()
 Checks if entity is marked for removal. More...
 
int64_t id () const
 Returns the entity ID. More...
 
- Public Member Functions inherited from Hypertable::Serializable
virtual size_t encoded_length () const
 Returns serialized object length. More...
 
virtual void encode (uint8_t **bufp) const
 Writes serialized representation of object to a buffer. More...
 
virtual void decode (const uint8_t **bufp, size_t *remainp)
 Reads serialized representation of object from a buffer. More...
 

Additional Inherited Members

- Protected Member Functions inherited from Hypertable::Operation
uint8_t encoding_version () const override
 Returns encoding version. More...
 
size_t encoded_length_internal () const override
 Returns internal serialized length. More...
 
void encode_internal (uint8_t **bufp) const override
 Writes serialized representation of object to a buffer. More...
 
void decode_internal (uint8_t version, const uint8_t **bufp, size_t *remainp) override
 Reads serialized representation of object from a buffer. More...
 
void decode_old (const uint8_t **bufp, size_t *remainp, uint16_t definition_version)
 
bool validate_subops ()
 Handles the results of sub operations. More...
 
void stage_subop (std::shared_ptr< Operation > operation)
 Stages a sub operation for execution. More...
 
- Protected Member Functions inherited from Hypertable::MetaLog::Entity
void encode_entry (uint8_t **bufp)
 Encodes entity header plus serialized state. More...
 
- Protected Attributes inherited from Hypertable::Operation
ContextPtr m_context
 Pointer to Master context. More...
 
EventPtr m_event
 Pointer to client event (if any) that originated the operation. More...
 
uint16_t m_remove_approvals {}
 Remove approvals received. More...
 
uint16_t m_remove_approval_mask {}
 Remove approval mask. More...
 
int32_t m_original_type {}
 Original entity type read from MML (prior to conversion) More...
 
int32_t m_error {}
 Result error code. More...
 
String m_error_msg
 Result error message. More...
 
bool m_unblock_on_exit {}
 Flag to signal operation to be unblocked on exit (post_run()) More...
 
bool m_blocked {}
 Flag indicating if operation is blocked. More...
 
bool m_ephemeral {}
 Indicates if operation is ephemeral and does not get persisted to MML. More...
 
ClockT::time_point m_expiration_time
 Expiration time (used by ResponseManager) More...
 
int64_t m_hash_code
 Hash code uniqely identifying operation. More...
 
DependencySet m_exclusivities
 Set of exclusivities. More...
 
DependencySet m_dependencies
 Set of dependencies. More...
 
DependencySet m_obstructions
 Set of obstructions. More...
 
DependencySet m_obstructions_permanent
 Set of permanent obstructions. More...
 
std::vector< int64_t > m_sub_ops
 Vector of sub operations IDs. More...
 
- Protected Attributes inherited from Hypertable::MetaLog::Entity
std::mutex m_mutex
 Mutex for serializing access to members More...
 
EntityHeader header
 Entity header More...
 

Detailed Description

Gathers and processes RangeServer statistics.

Definition at line 42 of file OperationGatherStatistics.h.

Constructor & Destructor Documentation

OperationGatherStatistics::OperationGatherStatistics ( ContextPtr context)

Constructor.

Definition at line 45 of file OperationGatherStatistics.cc.

virtual Hypertable::OperationGatherStatistics::~OperationGatherStatistics ( )
inlinevirtual

Destructor.

Definition at line 49 of file OperationGatherStatistics.h.

Member Function Documentation

virtual void Hypertable::OperationGatherStatistics::display_state ( std::ostream &  os)
inlinevirtual

Write human readable operation state to output stream.

This method is called by display() to write a human readable string representation of the operation state to os

Parameters
osOutput stream to which state string is to be written

Implements Hypertable::Operation.

Definition at line 62 of file OperationGatherStatistics.h.

virtual bool Hypertable::OperationGatherStatistics::exclusive ( )
inlinevirtual

Indicates if operation is exclusive.

An operation can be designated as exclusive which means that only one operation of this type may be added to the OperationProcessor at any given time. This method is used in conjunction with the name() method to determine if the operation can be added to the OperationProcessor. If this method returns true and another exclusive operation exists in the OperationProcessor with the same name as returned by name(), then the attempt to add the operation will throw an Exception with error code Error::MASTER_OPERATION_IN_PROGRESS.

Returns
true if operation is exclusive, false otherwise.

Reimplemented from Hypertable::Operation.

Definition at line 61 of file OperationGatherStatistics.h.

void OperationGatherStatistics::execute ( )
virtual

Carries out "gather statistics operation.

This method fetches statistics from all connected range servers by calling RangeServer::getStatistics(). The gathered statistics are used for disk threshold processing, putting the system into READONLY mode if aggreggate disk use exceeds the threshold. It also passes the gathered statistics to the monitoring system and the balancer.

Implements Hypertable::Operation.

Definition at line 52 of file OperationGatherStatistics.cc.

const String OperationGatherStatistics::label ( )
virtual

Human readable label for operation.

This method is used to generate a human readable string describing the operation and is typically used for generating log messages.

Returns
Human readable string describing operation

Implements Hypertable::Operation.

Definition at line 169 of file OperationGatherStatistics.cc.

const String OperationGatherStatistics::name ( )
virtual

Name of operation used for exclusivity.

An operation can be marked exclusive (see exclusvive()) which tells the Operation processor that only one operation of this name may be added to the dependency graph. If an attempt to add an an exclusive operation is made and the OperationProcessor already contains an exclusive operation with the same name, the attempt will fail and will result in an Exception with error code Error::MASTER_OPERATION_IN_PROGRESS.

Returns
Name of operation used to enforce exclusivity constraint

Implements Hypertable::Operation.

Definition at line 165 of file OperationGatherStatistics.cc.


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