What is distributed transaction in Java?

A distributed transaction is a set of two or more individual transactions, or branches, managed externally by a transaction manager and committed or rolled back as a single, global transaction. When it comes to distributed transactions, you have two choices of how to implement them.

Where distributed transactions can be used?

Distributed transactions are necessary when you need to quickly update related data that is spread across multiple databases.

What are the three properties followed by WCF transactions?

The four properties followed by a WCF transaction are the following:

• Atomic: Either everything should commit or nothing.
• Consistency: System should remain in consistent.
• Isolation: Resource sharing not allowed.
• Durable: State should be maintained regardless of any failure or loss.

How does a distributed transaction work?

Unlike a transaction on a local database, a distributed transaction involves altering data on multiple databases. In other words, the entire transaction commits, or the entire transaction rolls back. Oracle ensures the integrity of data in a distributed transaction using the two-phase commit mechanism.

How the transactions are handled in distributed database?

Any transaction must maintain the ACID properties, viz. Atomicity, Consistency, Isolation, and Durability. Consistency − A transaction should take the database from one consistent state to another consistent state. It should not adversely affect any data item in the database.

Which is a valid WCF transaction protocol?

Which protocol is used to handle transactions in WCF? WCF follows WS-* specifications. So it uses WS-Atomic protocol to managed transaction across WCF services. So you can have different WCF services hosted on different computers and they all can run under one transaction unit.

What are the main features of transactions in distributed system?

Distributed transactions, as any other transactions, must have all four ACID (atomicity, consistency, isolation, durability) properties, where atomicity guarantees all-or-nothing outcomes for the unit of work (operations bundle).

What are the different transaction isolation levels in WCF?

Explain the different transaction isolation levels in WCF.

• Read Uncommitted: Also known as Dirty isolation level.
• Read Committed: It ensures not to read the data that has been changed by any other application and is not yet committed.
• Repeatable Read: It stops the usage of dirt read and non-repeatable read.

How transactions are maintained in microservices?

Transactions can be initiated at the database level and can be committed or rolled back based on the final outcome of the transaction. There is no direct and simple way of maintaining ACID principles across multiple databases. This is the way the real challenge lies for transaction management in Microservices.

What are the goals of distributed transactions?

Lets summarize! The goal of transaction management in a distributed database is to control the execution of transactions so that: 1. Transactions have atomicity, durability, serializability and isolation properties.