CN113286380B - Communication establishing method, communication method and system based on middleware and Freeswitch - Google Patents
Communication establishing method, communication method and system based on middleware and Freeswitch Download PDFInfo
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- CN113286380B CN113286380B CN202110816905.6A CN202110816905A CN113286380B CN 113286380 B CN113286380 B CN 113286380B CN 202110816905 A CN202110816905 A CN 202110816905A CN 113286380 B CN113286380 B CN 113286380B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
- H04L67/141—Setup of application sessions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
- H04L69/163—In-band adaptation of TCP data exchange; In-band control procedures
Abstract
The invention relates to the technical field of communication, and discloses a communication establishing method, a communication method and a communication system based on middleware and Freeswitch, aiming at solving the problems of difficult development and thread blockage of the traditional communication method based on Freeswitch, and the main scheme comprises the following steps: creating a middleware example after a calling system is started; the middleware instance creates a thread pool for processing connection and a non-blocked TCP connection channel; the middleware instance creates a starting class as a component container, and connects the thread pool and the TCP connection channel, so that the thread pool monitors the TCP connection channel; the starting class creates a method handle and loads a required parameter to connect a FreeSwitch; the middleware instance subscribes to listening events and starts a listener to start listening for the Freeswitch's talk event. The invention reduces the complexity of program design and is suitable for a calling system.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a communication establishing method, a communication method and a communication system based on middleware and Freeswitch.
Background
Freeswitch is a soft switching solution for telephony, including a soft phone and a product driver for soft switches to provide voice and chat, and is widely used in the fields of switch engines, PBXs, multimedia gateways, and multimedia servers. Freeswitch is used as an open source soft switch platform, has powerful functions, provides secondary development functions and is easy to expand, has the characteristics of high concurrency, strong caps processing, flexible ivr processing and the like compared with other traditional soft switch platforms (such as asterisks), and is applied to a plurality of medium and large voice scenes.
Freeswitch may provide voice over internet protocol functionality in a call system as a signaling server, forwarding server, etc. Currently, there are two main ways for a call services system to interface with a Freeswitch:
the first method is to call FreeSwitch through an open source TCP client, develop FreeSwitch application and realize outbound flow control, and the method needs enterprises to develop ctiservers belonging to the enterprises aiming at respective scenes, but the open source TCP client is long-lived, codes are not easy to understand and develop secondarily, and a synchronous blocking channel is adopted to connect the FreeSwitch in technical realization, namely, a single-thread client, the instruction execution of the single-thread client is serial but not parallel, and any read-write operation can block the current thread until other operations are allowed. For example, to meet a requirement that a piece of pre-call music is played while a phone call is made, the client is a single-thread model, and only an equal-telephone call instruction reaches the FreeSwitch and the FreeSwitch returns to execute the next music playing instruction.
The second is that Freeswitch connects the business database and writes the embedded development lua script execution business logic in the business database. This approach is equivalent to listening to the call flow at the Freeswitch side, triggering the business rules and then performing the database operations. This approach writes a large amount of code, the business object is highly coupled to the FreeSwitch, and no operating instructions can be sent by the business system to the FreeSwitch because no bi-directional communication between the business system and the FreeSwitch is established.
Disclosure of Invention
The invention aims to solve the problems of difficult development and thread blocking of the conventional communication method based on Freeswitch, and provides a communication establishing method, a communication method and a communication system based on middleware and Freeswitch.
The technical scheme adopted by the invention for solving the technical problems is as follows:
in a first aspect, the present invention provides a communication establishment method based on middleware and Freeswitch, applied to a call system, including the following steps:
step 1, creating a middleware example after a calling system is started, wherein the middleware example carries parameters required by connection of FreeSwitch, and comprises an event callback executor which is used for executing corresponding service logic after a call event is monitored;
step 2, the middleware instance creates a thread pool for processing connection and a non-blocked TCP connection channel;
step 3, the middleware instance creates a starting class as a component container, and connects the thread pool and the TCP connection channel, so that the thread pool monitors the TCP connection channel;
step 4, the starting class creates a method handle, and loads a parameter required by connecting FreeSwitch to connect the FreeSwitch, wherein the method handle is a method for processing a message sent by the FreeSwitch;
and 5, the middleware instance subscribes a Freeswitch monitoring event and starts a monitor to monitor the call event of the Freeswitch.
Further, step 4 is followed by:
the Freeswitch asynchronously notifies a connection result to a middleware instance, the middleware instance judges whether a message of successful connection is received, if so, an authentication instruction is sent to the Freeswitch, and Freeswitch authentication is executed;
the Freeswitch asynchronously notifies the middleware instance of an authentication result, the middleware instance judges whether a message passing the authentication is received within a first preset time period, if so, the step 5 is carried out, and if not, the authentication process is returned to be overtime.
Further, the middleware instance judges whether the authenticated message is received within a first preset time period through an atomic operation.
Further, the step 5 is followed by:
the automatic reconnection and heartbeat mechanism for setting the middleware instance specifically comprises the following steps: and the middleware instance sends the heartbeat event to the Freeswitch according to a preset period, the Freeswitch returns the heartbeat event to the middleware instance after receiving the heartbeat event, and if the middleware instance does not receive the heartbeat event in a second preset time period, the middleware instance is automatically reconnected.
Further, the call event includes: the method comprises a call starting event and a hang-up event, wherein the call starting event at least comprises a called number.
Further, the event callback executor is configured to execute the corresponding service logic after the call event is monitored, including:
the event callback executor is used for performing service verification on a called number after monitoring a call start event of Freeswitch, if the verification is passed, the operation is not performed, otherwise, a hangup instruction is sent to the Freeswitch, and the service verification at least comprises: and checking whether the called number is a blacklist user or a blank number, and whether the calling frequency of the calling number or the called number exceeds the standard.
Further, the event callback executor is configured to execute the corresponding service logic after the call event is monitored, and further includes:
and the event callback executor is used for judging whether the called party hangs up or not after monitoring the hanging up event of the Freeswitch, and if so, sending an instruction for playing the polyphonic ringtone to the Freeswitch.
In a second aspect, the present invention further provides a communication system based on middleware and Freeswitch, which is established by using the above communication establishment method based on middleware and Freeswitch.
In a third aspect, the present invention further provides a communication method based on middleware and Freeswitch, which is applied to the communication system based on middleware and Freeswitch, and includes the following steps:
the event callback executor in the middleware instance executes service check on a called number after monitoring a call start event of Freeswitch, if the check is passed, the operation is not executed, otherwise, a hang-up instruction is sent to the Freeswitch, and the service check at least comprises: and checking whether the called number is a blacklisted user or not and checking whether the called number is a null number or not.
Further, still include:
and after monitoring the hang-up event of the Freeswitch, the event callback executor in the middleware example judges whether the hanging-up event is called hang-up or not, and if so, sends an instruction for playing the polyphonic ringtone to the Freeswitch.
The invention has the beneficial effects that: the communication establishing method, the communication method and the system based on the middleware and the FreeSwitch start the middleware as a component container to follow a service system, establish a bidirectional channel of the service system and the FreeSwitch, shield the complexity of a bottom operating system through the middleware, enable program developers to face a simple and uniform development environment, reduce the complexity of program design, concentrate attention on own services, and do not need to repeatedly work for transplanting programs on different system software, thereby greatly reducing the technical burden. Meanwhile, the workload of maintenance, operation and management of the system is reduced, and the investment of the total cost of the computer is also reduced. In addition, asynchronous non-blocking connection between the middleware and the Freeswitch is realized by establishing a non-blocking TCP connection channel, so that thread blocking is avoided, and the problem of system load in a high concurrent call application scene is solved.
Drawings
Fig. 1 is a timing diagram illustrating a communication establishment method according to an embodiment of the present invention, the communication establishment method being based on middleware and FreeSwitch;
fig. 2 is a schematic diagram of a communication method based on middleware and Freeswitch according to an embodiment of the present invention;
fig. 3 is another schematic diagram of a communication method based on middleware and Freeswitch according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The invention aims to solve the problems of difficult development and thread blocking of the existing communication method based on Freeswitch, and provides a communication establishing method, a communication method and a communication system based on middleware and Freeswitch, which are applied to a calling system and mainly comprise the following steps: the method comprises the steps that a middleware instance is created after a calling system is started, the middleware instance carries parameters required by connection of FreeSwitch, the middleware instance comprises an event callback actuator, and the event callback actuator is used for executing corresponding business logic after a call event is monitored; the middleware instance creates a thread pool for processing connection and a non-blocked TCP connection channel; the middleware instance creates a starting class as a component container, and connects the thread pool and the TCP connection channel, so that the thread pool monitors the TCP connection channel; the method comprises the steps that the starting class creates a method handle, and loads a parameter required by connection of a FreeSwitch to connect the FreeSwitch, wherein the method handle is a method for processing a message sent by the FreeSwitch; the middleware instance subscribes to Freeswitch listening events and creates a listener to begin listening for Freeswitch talk events.
Specifically, after the call system is started, a middleware instance is created, which includes: the method comprises the following steps that an event callback executor, a method for creating a listener, a method for connecting a FreeSwitch, a method for disconnecting the FreeSwitch, a method for checking whether the FreeSwitch is connected or not and a method for sending an instruction to the FreeSwitch are executed after a middleware instance is created, and the following procedures are executed to connect the FreeSwitch: creating a thread pool, a non-blocked TCP connection channel and a starting class, connecting the thread pool and the TCP connection channel, enabling the thread pool to monitor the channel, creating a method handle for the starting class, then loading parameters required by connection of the Freeswitch to connect the Freeswitch, finally subscribing a Freeswitch monitoring event by a middleware instance and creating a monitor to start monitoring a call event of the Freeswitch, and finishing the establishment of the communication system. And when a conversation event of Freeswitch is monitored, executing corresponding business logic through an event callback executor.
Examples
The communication establishing method based on the middleware and the Freeswitch in the embodiment of the invention is applied to a calling system, and comprises the following steps as shown in figure 1:
step 1, creating a middleware example after a calling system is started, wherein the middleware example carries parameters required by connection of FreeSwitch, and comprises an event callback executor which is used for executing corresponding service logic after a call event is monitored;
wherein, middleware instance also includes: the method comprises the steps of creating a listener, connecting a FreeSwitch method, disconnecting the FreeSwitch method, checking whether the FreeSwitch method is connected or not and sending an instruction to the FreeSwitch method, wherein in the process of establishing communication, a middleware instance calls a corresponding method to complete corresponding operation.
Step 2, the middleware instance creates a thread pool for processing connection and a non-blocked TCP connection channel;
step 3, the middleware instance creates a starting class as a component container, and connects the thread pool and the TCP connection channel, so that the thread pool monitors the TCP connection channel;
step 4, the starting class creates a method handle, and loads a parameter required by connecting FreeSwitch to connect the FreeSwitch, wherein the method handle is a method for processing a message sent by the FreeSwitch;
when a parameter required by the starting class loading connection Freeswitch is connected with the Freeswitch, the Freeswitch asynchronously notifies a connection result to a middleware instance, the middleware instance judges whether a message of successful connection is received, if so, a method for sending an instruction to the Freeswitch is called, an authentication instruction is sent to the Freeswitch, and the Freeswitch authentication is executed;
in order to avoid interruption of the operation of determining whether the authentication is completed by thread scheduling, in this embodiment, the middleware instance may determine whether the message that the authentication passes is received within the first preset time period through atomic operation (atomic operation). The atomic operation is not interrupted by a thread scheduling mechanism, once the atomic operation is started, the atomic operation is run to the end, and the atomic operation is not switched to another thread in the middle. The first preset time period is set according to actual conditions.
After the middleware instance sends an authentication instruction to the Freeswitch, the Freeswitch asynchronously notifies the middleware instance of an authentication result, the middleware instance judges whether a message passing the authentication is received within a first preset time period, if so, the step 5 is carried out, and if not, the authentication process is returned to be overtime.
And 5, subscribing the Freeswitch monitoring event by the middleware instance and creating a monitor to start monitoring the call event of the Freeswitch.
In order to avoid the interruption of the middleware instance and the Freeswitch, which affects the communication, the present embodiment further includes: the automatic reconnection and heartbeat mechanism for setting the middleware instance specifically comprises the following steps: and the middleware instance sends the heartbeat event to the Freeswitch according to a preset period, the Freeswitch returns the heartbeat event to the middleware instance after receiving the heartbeat event, and if the middleware instance does not receive the heartbeat event in a second preset time period, the middleware instance is automatically reconnected. And the preset period and the second preset time period are set according to actual conditions.
In this embodiment, the monitored call event of the FreeSwitch includes: the method comprises a call starting event and a hang-up event, wherein the call starting event at least comprises a called number.
As shown in fig. 2, after monitoring a call start event of the Freeswitch, the event callback executor of the middleware instance performs service check on a called number, and if the check passes, does not perform operation, otherwise, sends a hang-up instruction to the Freeswitch, where the service check at least includes: and checking whether the called number is a blacklist user or a blank number, and whether the calling frequency of the calling number or the called number exceeds the standard. Specifically, after a call start event of the Freeswitch is monitored, whether a called number is a blacklist user or a blank number and whether the calling frequency of a calling number and the called number exceeds the standard or not are judged, if one of the two exceeds the standard, a hang-up instruction is sent to the Freeswitch, and the Freeswitch hangs up after receiving the hang-up instruction.
As shown in fig. 3, after monitoring the hangup event of the FreeSwitch, the event callback executor determines whether the event is a hangup of a called party, and if so, sends an instruction for playing a hangup ring back tone to the FreeSwitch. Because the user does not know that the called party is hung up sometimes, the embodiment sends an instruction for playing the ring back tone to the Freeswitch after monitoring that the called party is hung up, and the Freeswitch plays the ring back tone to the calling party after receiving the instruction for playing the ring back tone to remind the calling party that the opposite party is hung up.
Based on the above technical solution, this embodiment further provides a communication system based on the middleware and the FreeSwitch, where the communication system is established by using the communication establishment method based on the middleware and the FreeSwitch.
Based on the above technical solution, this embodiment further provides a communication method based on middleware and Freeswitch, which is applied to the communication system based on middleware and Freeswitch, and the communication method includes the following steps:
the event callback executor in the middleware instance executes service check on a called number after monitoring a call start event of Freeswitch, if the check is passed, the operation is not executed, otherwise, a hang-up instruction is sent to the Freeswitch, and the service check at least comprises: and checking whether the called number is a blacklisted user or not and checking whether the called number is a null number or not. And after monitoring the hang-up event of the Freeswitch, the event callback executor in the middleware instance judges whether the hanging-up event is called hang-up or not, and if so, sends an instruction for playing the polyphonic ringtone to the Freeswitch.
It can be understood that, because the communication system and method based on the middleware and the Freeswitch according to the embodiments of the present invention are the communication system and method established based on the communication establishment method based on the middleware and the Freeswitch according to the embodiments, the communication system and the communication method disclosed in the embodiments are described more simply because they correspond to the communication establishment method disclosed in the embodiments, and the relevant points can be referred to only the partial description of the communication establishment method.
Claims (9)
1. A communication establishing method based on middleware and Freeswitch is applied to a calling system and is characterized by comprising the following steps:
step 1, creating a middleware example after a calling system is started, wherein the middleware example carries parameters required by connection of FreeSwitch, and comprises an event callback executor which is used for executing corresponding service logic after a call event is monitored;
step 2, the middleware instance creates a thread pool for processing connection and a non-blocked TCP connection channel;
step 3, the middleware instance creates a starting class as a component container, and connects the thread pool and the TCP connection channel, so that the thread pool monitors the TCP connection channel;
step 4, the starting class creates a method handle, and loads a parameter required by connecting FreeSwitch to connect the FreeSwitch, wherein the method handle is a method for processing a message sent by the FreeSwitch;
the step 4 is followed by:
the Freeswitch asynchronously notifies a connection result to a middleware instance, the middleware instance judges whether a message of successful connection is received, if so, an authentication instruction is sent to the Freeswitch, and Freeswitch authentication is executed;
the Freeswitch asynchronously notifies an authentication result to a middleware instance, the middleware instance judges whether a message passing the authentication is received within a first preset time period, if so, the step 5 is carried out, otherwise, the authentication process is returned to be overtime;
and 5, subscribing the Freeswitch monitoring event by the middleware instance and creating a monitor to start monitoring the call event of the Freeswitch.
2. The middleware and Freeswitch-based communication setup method of claim 1, where the middleware instance determines through atomic operations whether an authenticated message is received within a first preset time period.
3. The middleware and Freeswitch based communication setup method of claim 1, further comprising after said step 5:
the automatic reconnection and heartbeat mechanism for setting the middleware instance specifically comprises the following steps: and the middleware instance sends the heartbeat event to the Freeswitch according to a preset period, the Freeswitch returns the heartbeat event to the middleware instance after receiving the heartbeat event, and if the middleware instance does not receive the heartbeat event in a second preset time period, the middleware instance is automatically reconnected.
4. The middleware and Freeswitch based communication setup method of claim 1, in which said talk event comprises: the method comprises a call starting event and a hang-up event, wherein the call starting event at least comprises a called number.
5. The middleware and Freeswitch-based communication setup method of claim 4, in which said event callback executor is configured to execute corresponding business logic after listening for talk events comprises:
the event callback executor is used for performing service verification on a called number after monitoring a call start event of Freeswitch, if the verification is passed, the operation is not performed, otherwise, a hangup instruction is sent to the Freeswitch, and the service verification at least comprises: and checking whether the called number is a blacklist user or not, checking whether the called number is an empty number or not, and checking whether the calling frequency of the calling number and the called number exceeds the standard or not.
6. The middleware and Freeswitch-based communication setup method of claim 4, in which said event callback executor, after listening for talk events, executes corresponding business logic further comprising:
and the event callback executor is used for judging whether the called party hangs up or not after monitoring the hanging up event of the Freeswitch, and if so, sending an instruction for playing the polyphonic ringtone to the Freeswitch.
7. Middleware and Freeswitch based communication system, characterized in that it is set up with a middleware and Freeswitch based communication setup method according to any of claims 1 to 6.
8. Middleware and FreeSwitch based communication method, for use in a middleware and FreeSwitch based communication system according to claim 7, comprising the steps of:
the event callback executor in the middleware instance executes service check on a called number after monitoring a call start event of Freeswitch, if the check is passed, the operation is not executed, otherwise, a hang-up instruction is sent to the Freeswitch, and the service check at least comprises: and checking whether the called number is a blacklisted user or not and checking whether the called number is a null number or not.
9. The middleware and Freeswitch-based communications method of claim 8, further comprising:
and after monitoring the hang-up event of the Freeswitch, the event callback executor in the middleware example judges whether the hanging-up event is called hang-up or not, and if so, sends an instruction for playing the polyphonic ringtone to the Freeswitch.
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