CN105224561B - Cache storage method and device based on paging file - Google Patents
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Abstract
The invention discloses a cache storage method and a device based on paging files, which comprises the steps of firstly constructing a temporary file packet in a cache region when the paging files are operated; processing the paging file to trigger an event; storing the temporary file packet subjected to the event; and exiting the operation of paging the file, and deleting the temporary file packet in the cache region. Therefore, the cache storage method and device based on the paging file can efficiently store XML data.
Description
Technical Field
The present invention relates to the field of computers, and in particular, to a method and an apparatus for caching and saving based on paging files.
Background
With the rapid development of information technology, XML is becoming a standard for data representation and data exchange due to its unique advantages. XML has the characteristics of strong data description capacity, high flexibility, high activity, readability, platform independence and the like, and is increasingly widely applied to education application systems. The teaching resources described by the XML contain a large amount of animation, pictures, videos, sounds and other information, so that how to effectively store the XML data is an important problem of data management. In the prior art, an efficient storage method or device for XML data does not exist.
Disclosure of Invention
In view of this, the present invention provides a cache saving method and apparatus based on a paging file, which can efficiently store XML data.
Based on the above object, the present invention provides a cache saving method based on paging files, which comprises the following steps:
when starting to operate the paging file, firstly constructing a temporary file packet in a cache region;
processing the paging file to trigger an event;
storing the temporary file packet subjected to the event;
and exiting the operation of paging the file, and deleting the temporary file packet in the cache region.
Optionally, a temporary file package is constructed in the cache region, and a temporary file package is created in the specified cache region by calling the TemporaryDocumentCreator class.
Optionally, the temporary document package includes an XML description file and an associated binary file.
XML, and the content of the XML description file is management information of the file data described by the temporary file package.
Further, the associated binary files comprise a file preview for storing a file thumbnail, a folder slider for storing all page files, and a folder file for storing external data;
png is a thumbnail image of a first page in the paging file; the folder folders for storing all the page files refer to the fact that the corresponding XML files of each page are stored in the folders of the folders; and the folder filelibrary for storing the external data stores the external data corresponding to each page.
Further, the associated binary file also includes folders holding other types of attached files.
Further, the processing of the paging file triggers an event, and it needs to be determined whether the event is a page event or an object event.
Further, if the event is judged to be the object event, the page where the object in the object event is located is modified and stored, and the updateObjectEvent is called to modify and store the page where the object is located.
Further, if the event is judged to be not the object event, namely the page event, the file in the main folder and the files in the slides folder is modified and saved, and the updateslideEvent is called to modify the file in the main folder and the files in the slides folder and saved.
Further, when the page event or the object event is triggered, the content of the temporary file package in the cache is updated in time by calling the TemporaryDocumentUpdater class.
Further, the temporary file package of the event is saved, that is, the temporary file package of the event is stored with the related file and the folder in the designated directory according to the content recorded in the main.
Further, when the temporary file package of the event is saved, the content in the temporary package file is filtered according to the content in the main.xml file, and only the related content recorded in the mian.xml file is compressed according to the organization structure of the file and saved.
In addition, the invention also provides a cache storage device based on the paging file, which comprises:
creating a temporary file packet unit, which is used for constructing a temporary file packet in a cache region when starting to operate the paging file;
the triggering unit is connected with the temporary file packet creating unit and is used for processing the paging file and triggering an event;
the storage unit is connected with the trigger unit and used for storing the temporary file packet subjected to the page event;
and the deleting unit is connected with the storing unit and used for quitting the operation on the paging file and deleting the temporary file packet in the cache region.
Optionally, the create temporary package of files unit calls a TemporaryDocumentCreator class to create a temporary package of files in a specified cache region.
Optionally, the temporary document package created by the temporary document package unit includes an XML description file and an associated binary file.
XML, and the content of the XML description file is management information of the file data described by the temporary file package.
Further, the associated binary files comprise a file preview for storing a file thumbnail, a folder slider for storing all page files, and a folder file for storing external data;
png is a thumbnail image of a first page in the paging file; the folder folders for storing all the page files refer to the fact that the corresponding XML files of each page are stored in the folders of the folders; and the folder filelibrary for storing the external data stores the external data corresponding to each page.
Further, the associated binary file also includes folders holding other types of attached files.
Furthermore, the trigger unit comprises a judging module, a page event trigger module and an object event trigger module, wherein one end of the judging module is connected with the temporary file packet creating unit, and the other end of the judging module is respectively connected with the object event trigger module and the page event trigger module; the other end of the object event triggering module is connected with the storage unit, and the other end of the page event triggering module is connected with the storage unit;
the judging module processes the paging file, triggers an event and judges whether the event is a page event or an object event; and if the object event is not the object event, the page event triggering module modifies and stores the files in the main.
Further, the object event triggering module calls updateObjectEvent to modify and store the page where the object is located.
Further, the page event triggering module calls updateslideEvent to modify and save files in the main folder and the xml folder.
Further, when the temporary file package of the event is stored, the storing unit filters the content in the temporary package file according to the content in the main.
From the above, it can be seen that, according to the cache saving method and apparatus based on the paging file provided by the present invention, when the paging file is operated, a temporary file package is first constructed in the cache region; processing the paging file to trigger an event; storing the temporary file packet subjected to the event; and exiting the operation of paging the file, and deleting the temporary file packet in the cache region. Therefore, the cache storage method and device based on the paging file can reduce the disk space overhead and achieve the purpose of high-efficiency storage.
Drawings
FIG. 1 is a schematic flow chart illustrating a method for caching and saving based on paging files according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a cache storage device based on paging files according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a trigger unit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
Referring to fig. 1, a schematic flow chart of a cache saving method based on a paging file according to an embodiment of the present invention is shown, where the cache saving method based on a paging file includes:
In one embodiment of the invention, the temporary file package comprises an XML description file and an associated binary file. Preferably, the TemporaryDocumentCreator class is called to create a temporary package of files in the designated cache area.
XML, and the content of the XML description file is the management information of the file data described by the temporary file package, for example, the temporary file package includes the description of several pages, what the XML file name corresponding to each page is, how many external files each page includes, and the like. It should be noted that the external file refers to some external data involved in the page, such as external data of audio, flash, image, 3D model file, video, and so on.
Png may include a file preview for saving a thumbnail of a file, a folder slider for saving all page files, and a folder file for saving external data. Png may only be a thumbnail of the first page in the paging file.
The folder folders for storing all the page files refer to the fact that the corresponding XML files of each page are stored in the folders of the folders. Adding a corresponding page record in main.xml whenever a page is newly created by a user, and saving an XML file of the corresponding page in a slides folder. The page order recorded in the xml file is the page index order. And when the user switches the page, if the switched page is modified, replacing the corresponding XML file stored in the slides folder, otherwise, not replacing.
The folder filelibrary for storing the external data may store the external data corresponding to each page, where the external data includes audio, flash, images, 3D model files, videos, and the like. When a user creates an object containing an external file, the corresponding external file is stored in the fileibrary folder. If a plurality of same external files are inserted into the current page, only one copy of the external files needs to be stored and the insertion position of each external file is recorded.
Preferably, the associated binary file may further include folders holding other types of attached files.
It should be noted that only each page being processed is in memory, and the other pages are on disk. In addition, when a page needs to be processed and operated, the page is loaded from a disk into a memory. Therefore, the invention can be seen in that a large file is divided into paging files for processing, the operation effect is improved, and the memory occupation is greatly reduced.
As another embodiment of the present invention, the user can perform various data operations and processes on the paging file to trigger events.
In another embodiment, it is desirable to determine whether the event is a page event or an object event. It should be noted that, if the operation causes the content of the current page to change, it is an object event, and if the operation involves other pages, it is a page event. The page event may be said to be some operations of the page hierarchy, such as creating a page, deleting a page, copy a page, and turning pages, which mainly means that the number of pages changes. The object event mainly refers to some operations which can change the content of the page, and the adding of the object and some operations on the object can cause the change of the page, and these operations can be the object event. Wherein the object event includes: create new objects, change object properties, rotate, zoom, move, undo, redo, fill, and the like. The page events can include events such as new page, page deletion, page pasting, page cloning, page clearing, page turning, page revocation and recovery, page up and down shifting and the like, page attributes such as background color and page special effects.
Preferably, if the object event is a target event, the page where the object in the target event is located is modified and saved, and an updateObjectEvent may be called to modify and save the page where the object is located. If the events are not the object events, namely the page events, the files in the main folder and the slides folder are modified and saved, and the updateslideEvent can be called to modify and save the files in the main folder and the slides folder.
Preferably, when the user triggers a page event or an object event, the content of the temporary file package in the cache is updated in time by calling the TemporaryDocumentUpdater class.
And step 103, storing the temporary file package which has performed the event.
In one embodiment of the invention, the temporary file package which has completed the event stores related files and folders under the specified directory according to the content recorded in the main. Preferably, the content in the temporary package file is filtered according to the content in the main.xml file, and only the related content recorded in the mian.xml file is compressed and stored according to the organization structure of the file. Pages, objects and corresponding external files that have been deleted are not stored.
Wherein, the filtering the content in the temporary package file according to the content in the main. XML manages all pages, and when a page is deleted, the file is updated, the corresponding file is indexed for deletion, and when the file is compressed, the XML file corresponding to the deleted page is not compressed into the final file. The compression and storage of the related contents recorded in the mian.xml file according to the organization structure of the file means that: it is compressed according to the structure of the temporary package defined in the implementation of the present invention, compressing the unpacked files into a file with a specified suffix name, such as test. Preferably, when the user triggered saving or the automatic saving is triggered, the DocumentWrite class filters and compresses the content in the loose package according to the content recorded in main.
Preferably, the saving may be triggered by the user clicking a save button or a timer.
And 104, exiting the operation on the page file and deleting the temporary file packet in the cache region.
Referring to fig. 2, a schematic structural diagram of a cache storage device based on a paging file according to an embodiment of the present invention is shown, where the cache storage device based on a paging file includes:
a temporary package unit 201 is created to start operating on the paging file, and first construct a temporary package in the buffer.
And the triggering unit 202 is connected to the temporary file package creating unit 201, and is used for processing the paging file and triggering an event.
And the saving unit 203 is connected with the triggering unit 202 and is used for saving the temporary file package which has performed the page event.
And the deleting unit 204 is connected with the saving unit 203 and is used for quitting the operation on the paging file and deleting the temporary file packet in the cache region.
As another embodiment of the present invention, the temporary file package includes an XML description file and an associated binary file. Preferably, the TemporaryDocumentCreator class is called to create a temporary package of files in the designated cache area.
XML, and the content of the XML description file is the management information of the file data described by the temporary file package, for example, the temporary file package includes the description of several pages, what the XML file name corresponding to each page is, how many external files each page includes, and the like. It should be noted that the external file refers to some external data involved in the page, such as external data of audio, flash, image, 3D model file, video, and so on.
Png may include a file preview for saving a thumbnail of a file, a folder slider for saving all page files, and a folder file for saving external data. Png may only be a thumbnail of the first page in the paging file.
The folder folders for storing all the page files refer to the fact that the corresponding XML files of each page are stored in the folders of the folders. Adding a corresponding page record in main.xml whenever a page is newly created by a user, and saving an XML file of the corresponding page in a slides folder. The page order recorded in the xml file is the page index order. And when the user switches the page, if the switched page is modified, replacing the corresponding XML file stored in the slides folder, otherwise, not replacing.
The folder filelibrary for storing the external data may store the external data corresponding to each page, where the external data includes audio, flash, images, 3D model files, videos, and the like. When a user creates an object containing an external file, the corresponding external file is stored in the fileibrary folder. If a plurality of same external files are inserted into the current page, only one copy of the external files needs to be stored and the insertion position of each external file is recorded.
Preferably, the associated binary file may further include folders holding other types of attached files.
It should be noted that only each page being processed is in memory, and the other pages are on disk. In addition, when a page needs to be processed and operated, the page is loaded from a disk into a memory. Therefore, the invention can be seen in that a large file is divided into paging files for processing, the operation effect is improved, and the memory occupation is greatly reduced.
In another embodiment of the present invention, the triggering unit 202 may perform various data operations and processes on the paging file to trigger a page event.
In another embodiment, the saving unit 203 stores the relevant files and folders under the designated directory according to the contents recorded in the main.xml file for the temporary file package in which the page event is completed. Preferably, the content in the temporary package file is filtered according to the content in the main.xml file, and only the related content recorded in the mian.xml file is compressed and stored according to the organization structure of the file. Pages, objects and corresponding external files that have been deleted are not stored.
Wherein, the filtering the content in the temporary package file according to the content in the main. XML manages all pages, and when a page is deleted, the file is updated, the corresponding file is indexed for deletion, and when the file is compressed, the XML file corresponding to the deleted page is not compressed into the final file. The compression and storage of the related contents recorded in the mian.xml file according to the organization structure of the file means that: it is compressed according to the structure of the temporary package defined in the implementation of the present invention, compressing the unpacked files into a file with a specified suffix name, such as test. Preferably, when the user triggered saving or the automatic saving is triggered, the DocumentWrite class filters and compresses the content in the loose package according to the content recorded in main.
Preferably, the saving may be triggered by the user clicking a save button or a timer.
As another embodiment of the present invention, as shown in fig. 3, the triggering unit 202 includes a judging module 301, a page event triggering module 302, and an object event triggering module 303. One end of the judgment module 301 is connected to the temporary package creating unit 201, and the other end is connected to the object event triggering module 303 and the page event triggering module 302 respectively; the other end of the object event triggering module 303 is connected to the saving unit 203, and the other end of the page event triggering module 302 is connected to the saving unit 203.
Preferably, the determining module 301 processes the paging file, triggers an event, and determines whether the event is a page event or an object event. It should be noted that, if the operation causes the content of the current page to change, it is an object event, and if the operation involves other pages, it is a page event. The page event may be said to be some operations of the page hierarchy, such as creating a page, deleting a page, copy a page, and turning pages, which mainly means that the number of pages changes. The object event mainly refers to some operations which can change the content of the page, and the adding of the object and some operations on the object can cause the change of the page, and these operations can be the object event. Wherein the object event includes: create new objects, change object properties, rotate, zoom, move, undo, redo, fill, and the like. The page events can include events such as new page, page deletion, page pasting, page cloning, page clearing, page turning, page revocation and recovery, page up and down shifting and the like, page attributes such as background color and page special effects.
If the object event is the object event, the object event triggering module 303 modifies and stores the page where the object in the object event is located, and may call updateObjectEvent to modify and store the page where the object is located. If the events are not object events, the page event triggering module 302 modifies and saves the files in the main.
Preferably, when the user triggers a page event or an object event, the content of the temporary file package in the cache is updated in time by calling the TemporaryDocumentUpdater class.
In summary, the method and apparatus for cache storage based on paging files provided by the present invention creatively provide that a temporary file package is constructed in a cache region, if a file is modified, the file in the cache region is updated, and when a storage condition is met, the temporary file in the cache is compressed according to an organization structure of the file and stored in a path specified by a user; thereby achieving the purposes of reducing the space overhead of the disk and efficiently storing; meanwhile, because the invention adopts paging storage, when the editing is completed, basically all the page contents are stored in the local disk, and when the user clicks to store, the files only need to be compressed, even if there are many pages (such as 100 pages), the storage operation can be completed quickly; in addition, the invention only has the memory data of one page, which can greatly reduce the memory occupation amount, thereby ensuring that the operation speed is faster; in addition, when the abnormal exit exists, data are provided for the recovery of the file; finally, the whole cache storage method and device based on the paging file are simple, convenient and compact and easy to implement.
Those of ordinary skill in the art will understand that: the invention is not to be considered as limited to the specific embodiments thereof, but is to be understood as being modified in all respects, all changes and equivalents that come within the spirit and scope of the invention.
Claims (9)
1. A cache storage method based on paging files is characterized by comprising the following steps:
when starting to operate the paging file, firstly constructing a temporary file packet in a cache region;
processing the paging file to trigger an event;
storing the temporary file packet subjected to the event;
exiting the operation of paging files and deleting the temporary file packets in the cache region;
the temporary file package comprises an XML description file and an associated binary file;
XML, the content of which is management information of the file data described by the temporary document package, wherein the management information includes the number of the described pages included in the temporary document package, the XML file name corresponding to each page, and the number of external files included in each page, and the external files refer to external data related to the pages;
png for storing a file thumbnail, folder slides for storing all page files, and a folder fileobject for storing external data;
png is a thumbnail image of a first page in the paging file; the folder folders for storing all the page files refer to the fact that the corresponding XML files of each page are stored in the folders of the folders; and the folder filelibrary for storing the external data stores the external data corresponding to each page.
2. The method of claim 1, wherein the associated binary file further comprises a folder attributes that holds other types of attached files.
3. The method of claim 1, wherein processing the paging file triggers an event that requires determining whether the event is a page event or an object event.
4. The method according to claim 1, wherein the temporary file package of the event completed is saved, that is, the temporary file package of the event completed stores related files and folders under a specified directory according to the content recorded in the main.
5. The method according to claim 4, wherein when the temporary file package of the event is saved, the content in the temporary package file is filtered according to the content in the main.xml file, and only the related content recorded in the main.xml file is compressed according to the organization structure of the file and saved.
6. A cache saving apparatus based on a paging file, comprising:
creating a temporary file packet unit, which is used for constructing a temporary file packet in a cache region when starting to operate the paging file;
the triggering unit is connected with the temporary file packet creating unit and is used for processing the paging file and triggering an event;
the storage unit is connected with the trigger unit and used for storing the temporary file packet subjected to the page event;
the deleting unit is connected with the storing unit and used for quitting the operation on the paging file and deleting the temporary file packet in the cache region;
the temporary file package comprises an XML description file and an associated binary file;
XML, the content of which is management information of the file data described by the temporary document package, wherein the management information includes the number of the described pages included in the temporary document package, the XML file name corresponding to each page, and the number of external files included in each page, and the external files refer to external data related to the pages;
png for storing a file thumbnail, folder slides for storing all page files, and a folder fileobject for storing external data;
png is a thumbnail image of a first page in the paging file; the folder folders for storing all the page files refer to the fact that the corresponding XML files of each page are stored in the folders of the folders; and the folder filelibrary for storing the external data stores the external data corresponding to each page.
7. The apparatus of claim 6, wherein the associated binary file further comprises a folder attributes that holds other types of attached files.
8. The apparatus according to claim 6, wherein the triggering unit comprises a judging module, a page event triggering module and an object event triggering module, one end of the judging module is connected to the temporary package creating unit, and the other end of the judging module is respectively connected to the object event triggering module and the page event triggering module; the other end of the object event triggering module is connected with the storage unit, and the other end of the page event triggering module is connected with the storage unit;
the judging module processes the paging file, triggers an event and judges whether the event is a page event or an object event; and if the object event is not the object event, the page event triggering module modifies and stores the files in the main.
9. The apparatus according to claim 6, wherein the storing unit filters the content in the temporary package file according to the content in the main.xml file when the temporary package file of the event is stored, and compresses and stores only the related content recorded in the main.xml file according to the organization structure of the file.
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Address after: C1104 room 100085 Beijing city Haidian District Third Street No. 9 C Applicant after: Hitevision Polytron Technologies Inc Address before: C1104 room 100085 Beijing city Haidian District Third Street No. 9 C Applicant before: HONGHE TECHNOLOGY CO., LTD. |
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