Breaking News: Grepper is joining You.com. Read the official announcement!

Why is the two-phase commit algorithm used in distributed transactions?

Anjali Sharma answered on January 4, 2023 Popularity 3/10 Helpfulness 1/10

answer Why is the two-phase commit algorithm used in distributed transactions?

Why is the two-phase commit algorithm used in distributed transactions?

Comment

The two phase commit protocol is a distributed algorithm which lets all sites in a distributed system agree to commit a transaction.

The protocol results in either all nodes committing the transaction or aborting, even in the case of site failures and message losses.

class TransactionCoordinator…

  public void loadTransactionsFromWAL() throws IOException {
      List<WALEntry> walEntries = this.transactionLog.readAll();
      for (WALEntry walEntry : walEntries) {
          TransactionMetadata txnMetadata = (TransactionMetadata) Command.deserialize(new ByteArrayInputStream(walEntry.getData()));
          transactions.put(txnMetadata.getTxn(), txnMetadata);
      }
      startTransactionTimeoutScheduler();
      completePreparedTransactions();
  }
  private void completePreparedTransactions() throws IOException {
      List<Map.Entry<TransactionRef, TransactionMetadata>> preparedTransactions
              = transactions.entrySet().stream().filter(entry -> entry.getValue().isPrepared()).collect(Collectors.toList());
      for (Map.Entry<TransactionRef, TransactionMetadata> preparedTransaction : preparedTransactions) {
          TransactionMetadata txnMetadata = preparedTransaction.getValue();
          sendCommitMessageToParticipants(txnMetadata.getTxn());
      }
  }

https://martinfowler.com/articles/patterns-of-distributed-systems/two-phase-commit.html

Popularity 3/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: algorithm commit javascript

Link to this answer
Share Copy Link

Contributed on Jan 04 2023

Anjali Sharma

0 Answers Avg Quality 2/10

Why is the two-phase commit algorithm used in distributed transactions?

Contents

More Related Answers

Why is the two-phase commit algorithm used in distributed transactions?

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.