CN115686884A - Data transmission method for interprocess communication, electronic equipment and medium - Google Patents
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Abstract
The invention belongs to the technical field of computers, and particularly relates to a data transmission method, equipment and medium for interprocess communication, wherein the method comprises the following steps: the sending process divides the data to be sent into a plurality of subdata and sends data packet information to the receiving process; the receiving process receives the data packet information and creates a cache space according to the data packet information; the sending process sends a plurality of subdata to the receiving process one by one; and the receiving process receives a plurality of subdata one by one and stores the received subdata in the cache space. The data transmission method provided by the invention can achieve the purpose of sending big data among processes, can meet the data transmission condition of most functional scenes, and can also ensure that the system still has the advantages of performance and safety.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a data transmission method for interprocess communication, electronic equipment and a medium.
Background
In Android development, information communication is in indispensable key core technical content in establishing a complete module function. In the Android framework, message communication is mainly divided into intra-process and inter-process. There are many ways in which communication within a process can be accomplished; in addition to communication in the processes, the most important is communication between the processes, in Android, an Activity is started, a broadcast is sent, a service is started and the like, each important operation is communication between the processes, in the communication modes among the processes, a Binder is a main communication mode, but the space allocated by a Binder of an Android at the bottom layer is only 1M, the 1M needs to transmit header information of data, except the space occupied by the basic information, the 1M does not exist really for transmitting the data, and if data larger than 1M is transmitted among the processes, the system throws an exception, and finally the program is abnormally terminated.
Disclosure of Invention
In view of the above disadvantages of the prior art, the present invention provides a data transmission method, device and medium for interprocess communication, which can ensure that a system does not throw exception during the process of transmitting big data, and ensure the normal operation of a program.
To achieve the above and other related objects, the present invention provides a data transmission method for interprocess communication, comprising the steps of:
the sending process divides the data to be sent into a plurality of subdata and sends data packet information to the receiving process;
the receiving process receives the data packet information and creates a cache space according to the data packet information;
the sending process sends a plurality of subdata to the receiving process one by one;
and the receiving process receives a plurality of subdata one by one and stores the received subdata in the cache space.
In an optional embodiment of the present invention, before the step of dividing, by the sending process, data to be sent into a plurality of sub-data and sending data packet information to the receiving process, the method further includes:
and establishing connection between the sending process and the receiving process.
In an optional embodiment of the present invention, the step of the sending process dividing the data to be sent into a plurality of sub-data and sending the data packet information to the receiving process includes:
the sending process divides the data to be sent into a plurality of subdata according to a preset first data size threshold;
and the sending process sends the data packet information.
In an optional embodiment of the present invention, the step of the sending process dividing the data to be sent into a plurality of sub-data and sending the data packet information to the receiving process includes:
the sending process evenly divides the data to be sent into a plurality of subdata; the size of each subdata is smaller than a preset second data size threshold;
and the sending process sends the data packet information.
In an optional embodiment of the present invention, the data packet information includes a data size of data to be sent; the receiving process receiving the data packet information and creating a cache according to the data packet information includes:
the receiving process receives the data size of the data to be sent;
and the receiving process creates a cache space with a corresponding size according to the data size of the data to be sent.
In an optional embodiment of the present invention, the data packet information includes the number of the sub data; the step of receiving the plurality of sub-data one by the receiving process and storing the received plurality of sub-data in the buffer space further includes:
in the receiving process, the receiving process monitors the number of the received subdata;
and when the number of the received subdata is equal to that of the subdata in the data packet information, ending data reception.
The step of the receiving process receiving the plurality of sub-data one by one and storing the received plurality of sub-data in the buffer space further includes:
and the receiving process splices the sub data to obtain complete received data.
In an optional embodiment of the present invention, the data packet information includes a check code; the step of the receiving process receiving the plurality of sub-data one by one and storing the received plurality of sub-data in the buffer space further includes:
the receiving process judges the integrity of the received data through the check code: :
if the received data is not completely received, the receiving process sends a data resending request to the sending process, so that the sending process resends the plurality of sub data.
To achieve the above and other related objects, the present invention also provides an electronic device, comprising:
one or more processors;
a storage device for storing one or more programs that, when executed by the one or more processors, cause the electronic device to implement the method for transmission of interprocess communications.
To achieve the above and other related objects, the present invention also provides a computer-readable storage medium having stored thereon a computer program, which, when executed by a processor of a computer, causes the computer to execute the transmission method of interprocess communication.
The invention has the beneficial effects that: the invention is based on the data subpackage operation of the binder sending process, ensures the transmission, divides the big data into a plurality of data segments, transmits in batches and informs the corresponding receiving process. The advantages of performance and safety are still maintained while the transmission of complete data is ensured.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a schematic application scenario diagram of a data transmission method for interprocess communication according to an embodiment of the present invention;
FIG. 2 is a flow chart of a data transmission method for interprocess communication according to an embodiment of the invention;
FIG. 3 is a flow chart of partitioning a plurality of sub-data provided by an embodiment of the present invention;
FIG. 4 is a detailed flowchart of a data transmission method for interprocess communication according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating a specific process of a method for transmitting inter-process communication according to an embodiment of the present invention;
fig. 6 is a block diagram of an electronic device provided in an embodiment of the present invention.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure herein, wherein the embodiments of the present invention are described in detail with reference to the accompanying drawings and preferred embodiments. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be understood that the preferred embodiments are illustrative of the invention only and are not limiting upon the scope of the invention.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
In the following description, numerous details are set forth to provide a more thorough explanation of embodiments of the present invention, however, it will be apparent to one skilled in the art that embodiments of the present invention may be practiced without these specific details, and in other embodiments, well-known structures and devices are shown in block diagram form, rather than in detail, to avoid obscuring embodiments of the present invention.
The computer has the functions of data storage and modification and realizes the calculation of relevant logic and data, and is modern intelligent electronic equipment. As an electronic device integrating technologies such as network, computing, and media, the computer technology refers to a technical method and a technical means applied in the computer field, or refers to a hardware technology, a software technology, and an application technology thereof. The computer technology has obvious comprehensive characteristics, and is closely combined with electronic engineering, applied physics, mechanical engineering, modern communication technology, mathematics and the like.
The Binder is important IPC communication of android, the Binder object is an object which can be referenced by a cross-process, an entity of the Binder object is positioned in a process, the reference of the Binder object is distributed in each process of the system, and a Binder framework defines four roles: server, client, serviceManager (hereinafter abbreviated as SMgr), and Binder driver. The Server, the Client and the SMgr run in a user space, and the driver runs in a kernel space. The relationship of these four roles is similar to the internet: the Server is a Server, the Client is a Client terminal, the SMgr is a Domain Name Server (DNS), and the driver is a router. The Binder is the medium for the communication between the client and the server, when the BinderService is performed, the server returns a Binder object containing the service call of the server, and the client can obtain the service or data provided by the server through the Binder object.
In other application scenarios, the information transmission for the data is set according to the actual situation, which is not limited by the embodiment of the present invention.
Fig. 1 is a schematic view of an application scenario of a data transmission method for interprocess communication according to an embodiment of the present invention, where a sending process and a receiving process in a user space interact based on binder driving, the sending process sends data packet information through the binder driving, and the receiving process receives the data packet information through the binder, and upstream and downstream attributes of the interaction are determined, for example, in an implementation of a specific embodiment, the sending process is used as an upstream of the receiving process and provides a data packet for the receiving process, and in an implementation of another specific embodiment, the receiving process is used as a downstream of the sending process and cannot provide a data packet for the sending process.
The electronic device may be any electronic product capable of performing human-computer interaction with a user, for example, a Personal computer, a tablet computer, a smart phone, a Personal Digital Assistant (PDA), an interactive Internet Protocol Television (IPTV), an intelligent wearable device, and the like.
The electronic device may also include a network device and/or a user device. The network device includes, but is not limited to, a single network server, a server group consisting of a plurality of network servers, or a Cloud Computing (Cloud Computing) based Cloud consisting of a large number of hosts or network servers.
The Network where the electronic device is located includes, but is not limited to, the internet, a wide area Network, a metropolitan area Network, a local area Network, a Virtual Private Network (VPN), and the like.
Fig. 2 is a flowchart of a data transmission method for interprocess communication according to an embodiment of the present invention, where the data transmission is performed by defining an aid file, where the aid file must include two basic functions: one for transmitting packet information and one for transmitting a plurality of sub-data. The method may be applied to the implementation environment shown in fig. 1, and it should be understood that the method may also be applied to other exemplary implementation environments and specifically executed by devices in other implementation environments, and the embodiment does not limit the implementation environment to which the method is applied. Further, the data transmitted by the interprocess communication mentioned in the present invention is typically more than 1M data.
As shown in fig. 2, the data transmission method for interprocess communication in this embodiment at least includes:
step S210: the sending process divides the data to be sent into a plurality of subdata and sends data packet information to the receiving process.
As shown in fig. 3, the method specifically includes:
step S211: establishing a connection between the sending process and the receiving process;
first, under an Android system, a Proxy object (Proxy) of a receiving process is acquired through context.
Step S212: the sending process divides the data to be sent into a plurality of subdata;
because the data transmitted in this embodiment is greater than 1M, in order to avoid system abnormality and occupy too large memory space, in this embodiment, the sending process divides the data to be sent into a plurality of data smaller than 1M, so as to ensure normal transmission of the data.
Further, for the division of the data to be sent, the sending process may be divided according to a fixed first data size threshold; or the data to be sent can be uniformly divided into a plurality of subdata smaller than the second data size threshold; the data to be transmitted can also be divided at will. The dividing method and the dividing method of the data to be transmitted are not particularly limited, and the present invention is within the protection scope as long as the data to be transmitted can be divided into a plurality of subdata with the size smaller than the preset threshold. Preferably, the preset threshold is 1M.
Step S213: the sending process sends data packet information;
the packet information includes, but is not limited to, the packet length, the check code, and the number of sub-data. The length of the data packet is the size of the data to be sent, and the check code is used for checking the integrity of the data to be sent.
Step S220: and the receiving process receives the data packet information and creates a cache space according to the data packet information.
The receiving process receives the data packet information from the sending process, reads out the data packet length from the data packet information, and reads out the data packet length according to the data packet length
A correspondingly sized cache space is created. The cache space is used for receiving the plurality of subdata sent by the sending process and is used as a container for splicing and integrating the plurality of subdata.
Step S230: the sending process sends a plurality of subdata to the receiving process one by one;
in order to reduce the occupancy rate of the memory space, the sending process sends the sub-data one by one. Preferably, the sending process sends the multiple subdata one by one according to the dividing sequence, so that the receiving process performs concatenation and integration of the subdata. Of course, the transmission method of the plurality of sub-data is not limited to this, and it is within the scope of the present invention as long as the transmission process transmits the sub-data one by one.
Step S240: and the receiving process receives the sub data one by one and stores the received sub data in the cache space.
Since the sending process sends the subdata one by one, the receiving process receives the subdata one by one，And directly saves it to the buffer space after reception.
In a preferred embodiment of the present invention, during the process of receiving and receiving the sub-data, the number of the received sub-data is also detected in real time, and when the number of the received sub-data is equal to the number of the sub-data in the data packet information, the data reception is ended. It should be noted that the monitoring here refers to the automatic counting of the number of sub-data by the signal interface of the receiving process.
In a preferred embodiment of the present invention, as shown in fig. 4, the data transmission method for interprocess communication further includes:
step S250: and the receiving process splices the sub data to obtain complete received data.
After the receiving process receives all the subdata, the received subdata is spliced so as to be restored into complete data. Preferably, when the sending process performs to-be-sent data segmentation, all the subdata is sorted according to the segmentation order, and the sending process sends the subdata according to the order; therefore, the sub data received by the receiving process is also according to the segmentation sequence, and further, the receiving process can directly splice the sub data according to the sequence. The method for cutting the data to be sent, the method for sending the subdata and the method for splicing the subdata are all conventional technologies in the field, and the method is not particularly limited as long as the cutting of the data to be sent, the sending of the subdata and the splicing of the subdata can be realized.
Step S260: and the receiving process judges the integrity of the received data through the check code and sends a data resending request to the sending process when the receiving process does not receive the complete received data so that the sending process resends the plurality of subdata.
The invention is based on the frame of the binder, in order to realize the big data transmission, the data sub-packaging operation is carried out, the receiving process is informed of a plurality of sub-data quantities, the data splicing operation is carried out while the completion of the data transmission is ensured, and the data integrity is verified.
Fig. 5 is a specific processing flowchart of a data transmission method for interprocess communication according to an embodiment of the present invention, and the following describes a technical solution of the present invention with reference to a specific embodiment:
the method comprises the steps that a sending process and a receiving process are connected through a binder drive, after the connection is established, the sending process divides a data packet into a plurality of subdata, the sending process sends information such as data length and the number of the subdata to the receiving process through a proxy port, after the receiving process receives the information such as the data length, a buffer interval with a corresponding size is established, the sending process sends data packet information, after the receiving process receives the information, the receiving process reads data and writes the data, after the receiving process receives the plurality of subdata, the receiving process splices the plurality of subdata, and after splicing and receiving, the receiving process verifies the data packet.
In summary, the data transmission method for interprocess communication provided by the invention can achieve the purpose of sending big data among the processes, can meet the data transmission condition of most functional scenes, and can also ensure that the system still has the advantages of performance and safety.
An embodiment of the present invention further provides an electronic device, including: one or more processors; a storage device, configured to store one or more programs, which when executed by the one or more processors, cause the electronic device to implement the transmission method of interprocess communication provided in the above-described embodiments.
FIG. 6 illustrates a schematic structural diagram of a computer system suitable for use with the electronic device to implement an embodiment of the invention. It should be noted that the computer system 600 of the electronic device shown in fig. 6 is only an example, and should not bring any limitation to the function and the scope of the application of the embodiment of the present invention.
As shown in fig. 6, the computer system 600 includes a Central Processing Unit (CPU) 601, which can perform various appropriate actions and processes, such as executing the methods described in the above embodiments, according to a program stored in a Read-Only Memory (ROM) 602 or a program loaded from a storage portion 606 into a Random Access Memory (RAM) 603. In the RAM 603, various programs and data necessary for system operation are also stored. The CPU 601, ROM 602, and RAM 603 are connected to each other via a bus 604. An Input/Output (I/O) interface 605 is also connected to bus 604.
The following components are connected to the I/O interface 605: an input portion 606 including a keyboard, a mouse, and the like; an output section 607 including a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, a speaker, and the like; a storage portion 606 including a hard disk and the like; and a communication section 609 including a Network interface card such as a LAN (Local Area Network) card, a modem, or the like. The communication section 609 performs communication processing via a network such as the internet. The driver 610 is also connected to the I/O interface 605 as needed. A removable medium 611 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 610 as necessary, so that a computer program read out therefrom is mounted into the storage section 606 as necessary.
In particular, according to an embodiment of the present invention, the processes described above with reference to the flowcharts may be implemented as computer software programs. For example, embodiments of the invention include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising a computer program for performing the method illustrated in the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network through the communication section 609 and/or installed from the removable medium 611. The computer program executes various functions defined in the system of the present invention when executed by a Central Processing Unit (CPU) 601.
It should be noted that the computer readable medium shown in the embodiment of the present invention may be a computer readable signal medium or a computer readable storage medium or any combination of the two. The computer readable storage medium may be, for example, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a Read-Only Memory (ROM), an Erasable Programmable Read-Only Memory (EPROM), a flash Memory, an optical fiber, a portable Compact Disc Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present invention, a computer-readable signal medium may include a propagated data signal with a computer program readable therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. The computer program embodied on the computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the foregoing.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. Each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The units described in the embodiments of the present invention may be implemented by software, or may be implemented by hardware, and the described units may also be disposed in a processor. Wherein the names of the elements do not in some way constitute a limitation on the elements themselves.
Yet another aspect of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor of a computer, causes the computer to execute a transmission method such as interprocess communication. The computer-readable storage medium may be included in the electronic device described in the above embodiment, or may exist separately without being incorporated in the electronic device.
Yet another aspect of the invention provides a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the transmission method of interprocess communication provided in the above-mentioned embodiments.
The foregoing embodiments are merely illustrative of the principles of the present invention and its efficacy, and are not to be construed as limiting the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A data transmission method for interprocess communication comprises the following steps: characterized in that the method comprises:
the sending process divides the data to be sent into a plurality of subdata and sends data packet information to the receiving process;
the receiving process receives the data packet information and creates a cache space according to the data packet information;
the sending process sends a plurality of subdata to the receiving process one by one;
and the receiving process receives a plurality of subdata one by one and stores the received subdata in the cache space.
2. The method according to claim 1, wherein the step of the sending process dividing the data to be sent into a plurality of sub-data and sending the data packet information to the receiving process further comprises:
and establishing connection between the sending process and the receiving process.
3. The method of claim 1, wherein the step of the sending process dividing the data to be sent into a plurality of sub-data and sending the data packet information to the receiving process comprises:
the sending process divides the data to be sent into a plurality of subdata according to a preset first data size threshold;
and the sending process sends the data packet information.
4. The method of claim 1, wherein the step of the sending process dividing the data to be sent into a plurality of sub-data and sending the data packet information to the receiving process comprises:
the sending process evenly divides the data to be sent into a plurality of subdata; the size of each subdata is smaller than a preset second data size threshold;
and the sending process sends the data packet information.
5. The data transmission method for interprocess communication according to claim 1, wherein said packet information includes the data size of the data to be transmitted; the receiving process receiving the data packet information and creating a cache according to the data packet information includes:
the receiving process receives the data size of the data to be sent;
and the receiving process creates a cache space with a corresponding size according to the data size of the data to be sent.
6. The method according to claim 1, wherein the packet information includes the number of the sub-data; the step of receiving the plurality of sub-data one by the receiving process and storing the received plurality of sub-data in the buffer space further includes:
in the receiving process, the receiving process monitors the number of the received subdata;
and when the number of the received subdata is equal to that of the subdata in the data packet information, ending data reception.
7. The method of claim 1, wherein the step of receiving the sub-data one by one and storing the received sub-data in the buffer space further comprises:
and the receiving process splices the sub data to obtain complete received data.
8. The method of claim 1, wherein the packet information comprises a check code; the step of the receiving process receiving the plurality of sub-data one by one and storing the received plurality of sub-data in the buffer space further includes:
the receiving process judges the integrity of the received data through the check code;
and if the complete received data is not received, the receiving process sends a data resending request to the sending process so that the sending process resends the plurality of sub data.
9. An electronic device, characterized in that the electronic device comprises:
one or more processors;
storage means for storing one or more programs which, when executed by the one or more processors, cause the electronic device to implement the data transmission method of interprocess communication according to any one of claims 1 to 6.
10. A computer-readable storage medium, having stored thereon a computer program which, when executed by a processor of a computer, causes the computer to execute a data transmission method of interprocess communication according to any one of claims 1 to 6.
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