CN114416797A - Method and device for playing back historical data - Google Patents
Method and device for playing back historical data Download PDFInfo
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- CN114416797A CN114416797A CN202210062070.4A CN202210062070A CN114416797A CN 114416797 A CN114416797 A CN 114416797A CN 202210062070 A CN202210062070 A CN 202210062070A CN 114416797 A CN114416797 A CN 114416797A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/24—Querying
- G06F16/245—Query processing
- G06F16/2455—Query execution
- G06F16/24552—Database cache management
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/24—Querying
- G06F16/245—Query processing
- G06F16/2457—Query processing with adaptation to user needs
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/28—Databases characterised by their database models, e.g. relational or object models
- G06F16/284—Relational databases
- G06F16/285—Clustering or classification
- G06F16/287—Visualization; Browsing
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The invention discloses a method and a device for replaying historical data, which comprises the steps of acquiring data in an original consumption end interface; judging whether data needing to be extracted exist or not; if the data to be extracted exist, setting timing trigger, acquiring the data according to time cycle and writing the acquired data into a play buffer area; extracting data in the play buffer area and judging whether playback data exists or not; if the play buffer zone has playback data, extracting the playback data; processing the extracted playback data; judging whether the format and the attribute of the playback data meet the preset requirements or not; if yes, waiting for the triggering of a data timer, and sending the playback data to the original consumption interface and the front-end playing state interface after triggering; the invention uses the memory to circularly acquire the data, sets the size of the data volume and the reading time, and more efficiently displays the data in a real-time effect.
Description
Technical Field
The invention relates to the technical field of data processing, in particular to a method and a device for replaying historical data.
Background
In many real-time data systems today, the system architecture typically includes a time series data server (server) and a data consumer (client). The data displayed and processed by the consumer end are all real-time data, and the data time is kept consistent with the current time.
However, many existing systems can only display and calculate current data, and cannot play back and process historical data, and even if historical data needs to be played back, a set of system needs to be made separately.
Disclosure of Invention
Therefore, embodiments of the present invention provide a method and an apparatus for playing back historical data, so as to solve the problems that many existing systems in the prior art can only display and calculate current data, cannot play back and process historical data, and even if historical data needs to be played back, a set of system needs to be separately made.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
in a first aspect, a method of playing back historical data, comprising:
acquiring data in an original consumption end interface;
judging whether data needing to be extracted exist or not;
if no data needing to be extracted exists, the playing is finished, and the front-end playing state interface is returned;
if the data to be extracted exist, setting timing trigger, acquiring the data according to time cycle and writing the acquired data into a play buffer area;
extracting data in the play buffer area and judging whether playback data exist or not;
if the play buffer zone has playback data, extracting the playback data;
if the playing buffer zone has no playback data, waiting, and extracting when the playing buffer zone has playback data;
processing the extracted playback data;
judging whether the format and the attribute of the playback data meet the preset requirements or not;
if not, stopping downward execution and checking the format of the playback data;
and if so, waiting for the triggering of the data timer, and sending the playback data to the original consumption interface and the front-end playing state interface after the triggering.
Preferably, before acquiring the data in the original consuming-side interface, the method further includes: and setting the playback condition and the starting time of the data in the front-end playback setting interface.
Preferably, the data timer trigger is specifically:
acquiring a historical data time label and current time;
calculating a time difference delta t;
setting trigger sending time according to the delta t, and waiting for triggering of a trigger;
and when the time tag meets delta t, sending the data to the original consuming end interface and the front end playing state interface.
Preferably, the playback adjustment can be performed when the playback data is sent to the front-end playing state interface.
Preferably, the playback adjustment specifically includes:
judging whether the current state is a playing state;
if the playback data is in the playing state, screening the playback data;
if not, judging whether the playing state is a pause state;
if the playback data is in the pause state, stopping playback data transmission, keeping the current state and checking again;
if the state is not the pause state, judging whether the state is the stop state;
if the playback data is in a stop state, stopping playback data transmission and jumping out of the play queue;
if not, judging whether the state is a fast forward state;
if the fast forwarding state exists, the offset adjustment is carried out on the data behind the queue forwards.
If not, judging whether the state is a rollback state;
if the queue is in the rollback state, the front data in the queue is subjected to offset adjustment backwards.
Preferably, when the state is determined to be pause, stop, fast forward, or rewind, the playback state is rechecked after the corresponding operation is performed and the playback position is returned to the start position.
Preferably, the method further comprises the step of performing index sorting on the real-time data according to the chronological order and storing the real-time data.
Preferably, the determination of whether there is data to be extracted is performed based on the occurrence interval of the data time series.
In a second aspect, an apparatus for playing back history data includes:
the acquisition module is used for acquiring data in an original consumption end interface;
the data extraction judging module is used for judging whether data needing to be extracted exist; if no data needing to be extracted exists, the playing is finished, and the front-end playing state interface is returned; if the data to be extracted exist, setting timing trigger, acquiring the data according to time cycle and writing the acquired data into a play buffer area;
the playback data extraction and judgment module is used for extracting the data in the play buffer area and judging whether the playback data exists or not; if the play buffer zone has playback data, extracting the playback data; if the playing buffer zone has no playback data, waiting, and extracting when the playing buffer zone has playback data;
the playback data processing module is used for processing the extracted playback data;
the format judging module is used for judging whether the format and the attribute of the playback data meet the preset requirements or not; if not, stopping downward execution and checking the format of the playback data; and if so, waiting for the triggering of the data timer, and sending the playback data to the original consumption interface and the front-end playing state interface after the triggering.
In a third aspect, a computer-readable storage medium has stored thereon a computer program which, when executed by a processor, performs method steps of playing back historical data.
The invention has at least the following beneficial effects: the invention provides a method and a device for replaying historical data, which comprises the steps of acquiring data in an original consumption end interface; judging whether data needing to be extracted exist or not; if no data needing to be extracted exists, the playing is finished, and the front-end playing state interface is returned; if the data to be extracted exist, setting timing trigger, acquiring the data according to time cycle and writing the acquired data into a play buffer area; extracting data in the play buffer area and judging whether playback data exists or not; if the play buffer zone has playback data, extracting the playback data; if the playing buffer zone has no playback data, waiting is carried out, and when the playing buffer zone has the playback data, extraction is carried out; processing the extracted playback data; judging whether the format and the attribute of the playback data meet the preset requirements or not; if not, stopping downward execution and checking the format of the playback data; if yes, waiting for the triggering of a data timer, and sending the playback data to the original consumption interface and the front-end playing state interface after triggering; the invention uses the memory to circularly acquire the data, sets the size of the data volume and the reading time, and more efficiently displays the data in a real-time effect.
Drawings
In order to more clearly illustrate the prior art and the present invention, the drawings which are needed to be used in the description of the prior art and the embodiments of the present invention will be briefly described. It should be apparent that the drawings in the following description are merely exemplary, and that other drawings may be derived from the provided drawings by those of ordinary skill in the art without inventive effort.
The structures, proportions, sizes, and other dimensions shown in the specification are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, and it is to be understood that all such modifications, changes in proportions, or alterations in size which do not affect the efficacy or objectives of the invention are not to be seen as within the scope of the present invention.
Fig. 1 is a first flowchart of a method for playing back historical data according to an embodiment of the present invention;
FIG. 2 is a second flowchart of a method for playing back historical data according to an embodiment of the present invention;
FIG. 3 is a flow chart of data timer triggering according to an embodiment of the present invention;
fig. 4 is a flowchart of determining playback adjustment according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In the description of the present invention, "a plurality" means two or more unless otherwise specified. The terms "first," "second," "third," "fourth," and the like in the description and claims of the present invention and in the above-described drawings (if any) are intended to distinguish between referenced items. For a scheme with a time sequence flow, the term expression does not need to be understood as describing a specific sequence or a sequence order, and for a scheme of a device structure, the term expression does not have distinction of importance degree, position relation and the like.
Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements specifically listed, but may include other steps or elements not expressly listed that are inherent to such process, method, article, or apparatus or that are added to a further optimization scheme based on the present inventive concept.
Referring to fig. 1 and fig. 2, an embodiment of the present invention provides a method for playing back history data, including:
s1: acquiring data in an original consumption end interface;
specifically, the data transmitted to the original consuming side interface is acquired by the back-end playback interface, and before the acquisition, the playback condition needs to be set in the front-end playback setting interface and the start time of the data is determined.
S2: judging whether data needing to be extracted exist or not;
if no data needing to be extracted exists, the playing is finished, and the front-end playing state interface is returned;
if the data to be extracted exist, setting timing trigger, acquiring the data according to time cycle and writing the acquired data into a play buffer area;
specifically, the data extractor acquires data received in the interface, and the internal extraction condition of the middleware of the data extractor is according to the occurrence interval of the data time sequence. And when data is to be extracted, setting a timing trigger, acquiring the data in a circulating mode according to time, entering a playing ending state when no data exists, and returning to a front-end playing interface.
And writing the data acquired by the timing trigger cycle and the data read from the database into a playing buffer area as buffer data, wherein the playing buffer area is the time for which the size of the memory and the data are preset in the memory, and the data are acquired periodically.
S3: extracting data in the play buffer area and judging whether playback data exist or not;
if the play buffer zone has playback data, extracting the playback data;
if the playing buffer zone has no playback data, waiting, and extracting when the playing buffer zone has playback data;
specifically, the play buffer is in a queue structure, but not limited to a queue, and may be implemented using other data structures. The queue extracts the data of the playing buffer area in a first-in first-out mode, and judges the data, if the playing buffer area has the data, the data is extracted; if no data exists, waiting is carried out, and when the playing buffer zone has data, extraction is carried out.
The data acquired by the play buffer is read continuously to prevent the data from being jammed. Meanwhile, the situation that only ten or one hundred pieces of data need to be displayed when a plurality of pieces of data need to be acquired is avoided, and unnecessary waste of resource space caused by data reading is reduced.
S4: processing the extracted playback data;
s5: judging whether the format and the attribute of the playback data meet the preset requirements or not;
if not, stopping downward execution and checking the format of the playback data;
and if so, waiting for the triggering of the data timer, and sending the playback data to the original consumption interface and the front-end playing state interface after the triggering.
Specifically, through the time series data pre-trigger setting, the format and the attribute of the data must meet the preset setting, and if not, the data will not be executed downwards continuously, and the format of the data needs to be checked. And the data meeting the format waits for the triggering of the data timer, the triggering is set in a time mode, and the data is sent after the triggering.
The data can be sent to the original consumption interface and sent to the front-end playing state interface for displaying, the state of the data can be changed in the playback adjusting interface, and the changeable states include fast forward, stop pause and the like. When the state of the data is changed, the state of the data extracted from the buffer area is also corresponding to the operation performed by the playback adjusting interface.
Referring to fig. 3, the data timer trigger specifically includes: when data are transmitted to a data timer, comparing a time tag (LastTime) of historical data with current time (CurrentTime) to calculate a variation delta t, setting trigger sending time according to the delta t, waiting for trigger triggering, and when the time tag of the data meets the condition of the delta t, sending the screened historical data to an original consumption end interface and a front end playing state meeting surface.
Referring to fig. 4, when sending the playback data to the front-end playing state interface, the playback adjustment can be performed, specifically: the state of the data extracted from the playing buffer and the queue playing sequence can be changed in the playback adjusting interface. The playback adjustment is realized by checking the current data state and controlling the data state when the data is transmitted to the front-end playing state interface. Firstly, judging whether the current state is a playing state or not, if so, transmitting data to a time trigger for screening; if not, judging whether the state is the pause state, if so, not continuing to transmit the data downwards, keeping the current state and then checking again; if not, judging whether the data is in a stop state, if so, stopping data transmission, not sending the data downwards, and jumping out of a play queue; if not, the state is judged to be a fast forward state, if the state is the fast forward state, the data at the back of the queue can be subjected to offset adjustment forward, and the data can be played preferentially during transmission; if not, the state is judged to be the fast forward state, if the state is the fast forward state, the data in the front of the queue is subjected to offset adjustment backwards, and the playing is delayed during the transmission. And when the state is pause, fast forward and backward, returning to the initial position after the corresponding operation is executed, and rechecking the playing state.
The method for playing back the historical data also has a time series data persistence function. And the real-time data is indexed, sorted and stored according to the time sequence by using the database, so that the rapid retrieval and extraction are facilitated.
The invention displays the data in the front-end interface in the historical data playback middleware in two modes of acquiring real-time data and reading a database, and changes the state of the data. The data is not read from the whole database, the data is circularly acquired by using the memory, the size of the data volume and the reading time are set, and the data is more efficiently displayed in a real-time effect.
Another embodiment of the present invention provides an apparatus for playing back history data, including:
the acquisition module is used for acquiring data in an original consumption end interface;
the data extraction judging module is used for judging whether data needing to be extracted exist; if no data needing to be extracted exists, the playing is finished, and the front-end playing state interface is returned; if the data to be extracted exist, setting timing trigger, acquiring the data according to time cycle and writing the acquired data into a play buffer area;
the playback data extraction and judgment module is used for extracting the data in the play buffer area and judging whether the playback data exists or not; if the play buffer zone has playback data, extracting the playback data; if the playing buffer zone has no playback data, waiting, and extracting when the playing buffer zone has playback data;
the playback data processing module is used for processing the extracted playback data;
the format judging module is used for judging whether the format and the attribute of the playback data meet the preset requirements or not; if not, stopping downward execution and checking the format of the playback data; and if so, waiting for the triggering of the data timer, and sending the playback data to the original consumption interface and the front-end playing state interface after the triggering.
The invention adds the historical data playback device in the middle link of the original real-time data source and data consumption end to simplify the system reconstruction or the realization scheme, and the historical data and the real-time data can provide service for the data sequence, thereby achieving the effect of playing back the state of the historical data in real time under the condition of less change of the existing device. The historical data can be screened only by obtaining the time labels of the historical data, and the historical data can be displayed at the front end, and meanwhile, the state of the data can be controlled in real time. Data extraction in the buffer area is optimized, so that the situations of jamming and memory waste during data display are avoided.
Specific limitations regarding the means for playing back the history data can be found in the above limitations regarding the method for playing back the history data, which are not described herein again.
Another embodiment of the invention provides a computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method steps of playing back historical data.
The above specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
All the technical features of the above embodiments can be arbitrarily combined (as long as there is no contradiction between the combinations of the technical features), and for brevity of description, all the possible combinations of the technical features in the above embodiments are not described; these examples, which are not explicitly described, should be considered to be within the scope of the present description.
The present invention has been described in considerable detail by the general description and the specific examples given above. It should be noted that it is obvious that several variations and modifications can be made to these specific embodiments without departing from the inventive concept, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method of playing back historical data, comprising:
acquiring data in an original consumption end interface;
judging whether data needing to be extracted exist or not;
if no data needing to be extracted exists, the playing is finished, and the front-end playing state interface is returned;
if the data to be extracted exist, setting timing trigger, acquiring the data according to time cycle and writing the acquired data into a play buffer area;
extracting data in the play buffer area and judging whether playback data exist or not;
if the play buffer zone has playback data, extracting the playback data;
if the playing buffer zone has no playback data, waiting, and extracting when the playing buffer zone has playback data;
processing the extracted playback data;
judging whether the format and the attribute of the playback data meet the preset requirements or not;
if not, stopping downward execution and checking the format of the playback data;
and if so, waiting for the triggering of the data timer, and sending the playback data to the original consumption interface and the front-end playing state interface after the triggering.
2. The method for playing back historical data according to claim 1, wherein before the obtaining the data in the original consuming-side interface, the method further comprises: and setting the playback condition and the starting time of the data in the front-end playback setting interface.
3. The method for playing back historical data according to claim 1, wherein the data timer trigger is specifically:
acquiring a historical data time label and current time;
calculating a time difference delta t;
setting trigger sending time according to the delta t, and waiting for triggering of a trigger;
and when the time tag meets delta t, sending the data to the original consuming end interface and the front end playing state interface.
4. The method of claim 1, wherein the sending the playback data to the front-end play state interface enables playback adjustment.
5. The method for playing back historical data according to claim 4, wherein the playback adjustment is specifically:
judging whether the current state is a playing state;
if the playback data is in the playing state, screening the playback data;
if not, judging whether the playing state is a pause state;
if the playback data is in the pause state, stopping playback data transmission, keeping the current state and checking again;
if the state is not the pause state, judging whether the state is the stop state;
if the playback data is in a stop state, stopping playback data transmission and jumping out of the play queue;
if not, judging whether the state is a fast forward state;
if the data is in the fast forward state, forward shifting and adjusting the data behind the queue;
if not, judging whether the state is a rollback state;
if the queue is in the rollback state, the front data in the queue is subjected to offset adjustment backwards.
6. The method of claim 5, wherein when the state is determined to be pause, stop, fast forward, or rewind, the playback status is checked again by returning to the start position after the corresponding operation is performed.
7. The method of playing back historical data according to claim 1, further comprising indexing and storing the real-time data in chronological order.
8. The method for playing back history data according to claim 1, wherein said determination as to whether there is data to be extracted is made based on occurrence intervals of a time series of data.
9. An apparatus for playing back history data, comprising:
the acquisition module is used for acquiring data in an original consumption end interface;
the data extraction judging module is used for judging whether data needing to be extracted exist; if no data needing to be extracted exists, the playing is finished, and the front-end playing state interface is returned; if the data to be extracted exist, setting timing trigger, acquiring the data according to time cycle and writing the acquired data into a play buffer area;
the playback data extraction and judgment module is used for extracting the data in the play buffer area and judging whether the playback data exists or not; if the play buffer zone has playback data, extracting the playback data; if the playing buffer zone has no playback data, waiting, and extracting when the playing buffer zone has playback data;
the playback data processing module is used for processing the extracted playback data;
the format judging module is used for judging whether the format and the attribute of the playback data meet the preset requirements or not; if not, stopping downward execution and checking the format of the playback data; and if so, waiting for the triggering of the data timer, and sending the playback data to the original consumption interface and the front-end playing state interface after the triggering.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 8.
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