two-phase-commit | Implementation of the Two-phase commit protocol in Java

by baversjo Java Version: Current License: No License

X-Ray Key Features Code Snippets Community Discussions(3)Vulnerabilities Install Support

kandi X-RAY | two-phase-commit Summary

two-phase-commit is a Java library. two-phase-commit has no vulnerabilities and it has high support. However two-phase-commit has 5 bugs and it build file is not available. You can download it from GitHub.

Implementation of the Two-phase commit protocol in Java

Support

Quality

Security

License

Reuse

Support

two-phase-commit has a highly active ecosystem.

It has 16 star(s) with 10 fork(s). There are 1 watchers for this library.

It had no major release in the last 6 months.

There are 1 open issues and 0 have been closed. On average issues are closed in 999 days. There are no pull requests.

It has a negative sentiment in the developer community.

The latest version of two-phase-commit is current.

Quality

two-phase-commit has 5 bugs (0 blocker, 0 critical, 4 major, 1 minor) and 69 code smells.

Security

two-phase-commit has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

two-phase-commit code analysis shows 0 unresolved vulnerabilities.

There are 10 security hotspots that need review.

License

two-phase-commit does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

two-phase-commit releases are not available. You will need to build from source code and install.

two-phase-commit has no build file. You will be need to create the build yourself to build the component from source.

It has 426 lines of code, 29 functions and 10 files.

It has low code complexity. Code complexity directly impacts maintainability of the code.

Top functions reviewed by kandi - BETA

kandi has reviewed two-phase-commit and discovered the below as its top functions. This is intended to give you an instant insight into two-phase-commit implemented functionality, and help decide if they suit your requirements.

Main entry point
Disort all participants
Returns the latest string in the log
Prints the commit
Aborts running
Returns a string representation of the socket
Stops the TCP server
Write a log message
Close the connection
Increment the global commit
Sends a message
Receive a message from the socket
Start commit
Start participant
Start a Participant
Disort all participants
Returns the latest string in the log
Prints the commit
Aborts running
Returns a string representation of the socket
Stops the TCP server
Write a log message
Close the connection
Increment the global commit
Sends a message
Receive a message from the socket
Start commit
Start participant
Run the server
Handle incoming message
Returns true if this object equals another object

Get all kandi verified functions for this library.

two-phase-commit Key Features

No Key Features are available at this moment for two-phase-commit.

two-phase-commit Examples and Code Snippets

No Code Snippets are available at this moment for two-phase-commit.

Community Discussions

Trending Discussions on two-phase-commit

Using two phase commits on postgres

MongoDB data integrity

Is it possible to have two MSSQL persistence units in a transaction without XA?

QUESTION

Using two phase commits on postgres

Asked 2019-Nov-27 at 00:06

Asumming that a have a table called "t1" in a "db1" and other table called "t2" in a "db2", and i need to insert a record on both tables or fails.

Connected to the db1 i guess i shall type this

...

ANSWER

Answered 2019-Nov-26 at 19:33

I think you misunderstood PREPARE TRANSACTION.

That statement ends work on the transaction, that is, it should be issued after all the work is done. The idea is that PREPARE TRANSACTION does everything that could potentially fail during a commit except for the commit itself. That is to guarantee that a subsequent COMMIT PREPARED cannot fail.

The idea is that processing is as follows:

Run START TRANSACTION on all database involved in the distributed transaction.
Do all the work. If there are errors, ROLLBACK all transactions.
Run PREPARE TRANSACTION on all databases. If that fails anywhere, run ROLLBACK PREPARED on those database where the transaction was already prepared and ROLLBACK on the others.
Once PREPARE TRANSACTION has succeeded everywhere, run COMMIT PREPARED on all involved databases.

That way, you can guarantee “all or nothing” across several databases.

One important component here that I haven't mentioned is the distributed transaction manager. It is a piece of software that persistently memorizes where in the above algorithm processing currently is so that it can clean up or continue committing after a crash.

Without a distributed transaction manager, two-phase commit is not worth a lot, and it is actually dangerous: if transactions get stuck in the “prepared” phase but are not committed yet, they will continue to hold locks and (in the case of PostgreSQL) block autovacuum work even through server restarts, as such transactions must needs be persistent.

This is difficult to get right.

Source https://stackoverflow.com/questions/59057621

QUESTION

MongoDB data integrity

Asked 2018-Mar-09 at 03:46

I'm new to MongoDB, and the most difficult to understand is how to ensure data integrity.

I've got two collections Post -> Comment (One to many).

Is there a way to store number of comments for each post, without of using two phase commit?

...

ANSWER

Answered 2018-Mar-09 at 03:46

Since you mentioned embedding comments within the Post is not a viable option for your use case and don't want to go with 2 phase commit,

I can think of below options:

Creating a secondary index on postId attribute of Comment collection. And finally using count(...) function based on postId on Comment collection.
The other option is to have a map-reduce job that stores the commentCount and postId in a new collection every time a Comment document is added.

In both the options you would not need to store commentNumbers in the Post document. One thing to note is, since the commentsCount is not part of Post document this would result in new query to mongo to read the count.

Source https://stackoverflow.com/questions/49176763

QUESTION

Is it possible to have two MSSQL persistence units in a transaction without XA?

Asked 2017-Feb-02 at 14:57

We have an application that has a number of entity classes for which there must be two tables. The tables are identical, with the only difference being the name. The common solutions offered here on SO are to use inheritance (a mapped superclass and a table-per-class strategy) or two persistence units with different mappings. We use the latter solution and the application is built on top of this approach, so it's now considered a given.

There are EJB methods which will do updates on both persistence contexts and must do so within one transaction. Both persistence contexts have the same data source, which is an XA-enabled connection to a Microsoft SQL Server database (2012 version). The only difference between the contexts is that one has a mapping XML to alter the table names for some entity classes and thus works on those tables.

One of the architecture leads would like to see XA transactions eliminated, since they cause a significant overhead on the database and apparently also make the logging and analysis of the queries that are executed more difficult, possibly also preventing some prepared statement caching. I don't know all the details, but for a lot of applications we've managed to eliminate XA. For this one, however, we currently can't because of the two persistence contexts.

Is there some way in this situation to get the updates to both contexts to happen in a transactional manner without XA? If so, how? If not, is there some architectural or configuration change possible to use one persistence context without having to turn to subclasses for the two tables?

I am aware of these questions: Is it possible to use more than one persistence unit in a transaction, without it being XA? and XA transaction for two phase commit

Before voting to close this as a duplicate, take note that the situations are different. We're not in a read-only situation like in the first question, both contexts operate on the same database, we're using MSSQL exclusively and we're on GlassFish, not Weblogic.

...

ANSWER

Answered 2017-Feb-02 at 14:57

After some experimenting, I've found that it is in fact possible to have two persistence units that use non-XA resources within a container-managed transaction. However, it may be implementation-dependent. TL;DR at the bottom.

JTA should require XA resources if more than one resource participates in a transaction. It uses X/Open XA for the purpose of allowing distributed transactions, for example over multiple databases, or a database and JMS queue. There is apparently some optimization (it may be GlassFish-specific, I'm not sure) that allows the last participant to be non-XA. In my use-case, however, both persistence units are for the same database (but a different set of tables, with some possible overlap) and both are non-XA. This means we'd expect an exception to be thrown when the second resource does not support XA.

Suppose this is our persistence.xml

Source https://stackoverflow.com/questions/41868714

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install two-phase-commit

You can download it from GitHub.
You can use two-phase-commit like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the two-phase-commit component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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