Number generation method and device

Abstract

The invention discloses a number generation method and device, and relates to the technical field of computers. A specific embodiment of the method comprises the following steps: after a request for acquiring a unique number sent by a distributed application system is received, searching a stored latest number in a blockchain network; according to the stored latest number, obtaining the unique number through calculation according to a preset rule; and returning the unique number to the distributed application system. According to the embodiment, the defects that the generated number is long and the database writing performance is reduced due to the fact that a UUID mode is used can be overcome, dependence on a clock of a machine is avoided, the situation that the number is not globally increased is avoided, and high efficiency and reliability are achieved.

Description

technical field [0001] The present invention relates to the field of computer technology, in particular to a method and device for generating numbers. Background technique [0002] In a distributed environment, numbers (such as ID (identification)) are often used as unique identifiers in many projects. For example, in distributed services, some services send messages to queues, and other services consume messages from queues, and messages may be repeated. , the consumer side needs to be idempotent. In order to achieve idempotency of the business, there needs to be a non-repeatable and increasing number. In addition, order numbers, user numbers, etc. will use a unique increasing number. [0003] At present, there are mainly two methods for generating distributed unique self-incrementing numbers: one is to use UUID (Universally Unique Identifier, universally unique identification code): String uuid=UUID.randomUUID().toString(), this way A globally unique identification code w...

AI Technical Summary

Problems solved by technology

[0005] Using the UUID method results in a longer length of the generated number, and when it is stored as a database index, because the database index is mostly in the form of a B+ tree, when an unordered number is inserted, it may cause a new record to be inserted into the appropriate Move a large amount of data around the location, thereby reducing write performance;

[0006] The use of the snowFlake algorithm relies on the clock of the machine. If the server clock is dialed back, it will cause duplicate numbers to be generated. In a distributed environment, the clock of each server cannot be completely synchronized, and sometimes it is not globally incremented.

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