| package org.apache.aries.tx.control.service.local.impl; |
| |
| import static org.osgi.service.transaction.control.TransactionStatus.ACTIVE; |
| import static org.osgi.service.transaction.control.TransactionStatus.COMMITTED; |
| import static org.osgi.service.transaction.control.TransactionStatus.COMMITTING; |
| import static org.osgi.service.transaction.control.TransactionStatus.MARKED_ROLLBACK; |
| import static org.osgi.service.transaction.control.TransactionStatus.ROLLED_BACK; |
| import static org.osgi.service.transaction.control.TransactionStatus.ROLLING_BACK; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.concurrent.atomic.AtomicReference; |
| import java.util.function.Consumer; |
| |
| import javax.transaction.xa.XAResource; |
| |
| import org.apache.aries.tx.control.service.common.impl.AbstractTransactionContextImpl; |
| import org.osgi.service.coordinator.Coordination; |
| import org.osgi.service.transaction.control.LocalResource; |
| import org.osgi.service.transaction.control.TransactionContext; |
| import org.osgi.service.transaction.control.TransactionStatus; |
| |
| public class TransactionContextImpl extends AbstractTransactionContextImpl implements TransactionContext { |
| |
| final List<LocalResource> resources = new ArrayList<>(); |
| |
| private final boolean readOnly; |
| |
| private AtomicReference<TransactionStatus> tranStatus = new AtomicReference<>(ACTIVE); |
| |
| |
| public TransactionContextImpl(Coordination coordination, boolean readOnly) { |
| super(coordination); |
| this.readOnly = readOnly; |
| } |
| |
| @Override |
| public Object getTransactionKey() { |
| return coordination.getId(); |
| } |
| |
| @Override |
| public boolean getRollbackOnly() throws IllegalStateException { |
| switch (tranStatus.get()) { |
| case MARKED_ROLLBACK: |
| case ROLLING_BACK: |
| case ROLLED_BACK: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| @Override |
| public void setRollbackOnly() throws IllegalStateException { |
| TransactionStatus status = tranStatus.get(); |
| switch (status) { |
| case ACTIVE: |
| case MARKED_ROLLBACK: |
| if(!tranStatus.compareAndSet(status, MARKED_ROLLBACK)) |
| setRollbackOnly(); |
| break; |
| case COMMITTING: |
| // TODO something here? If it's the first resource then it might |
| // be ok to roll back? |
| throw new IllegalStateException("The transaction is already being committed"); |
| case COMMITTED: |
| throw new IllegalStateException("The transaction is already committed"); |
| |
| case ROLLING_BACK: |
| case ROLLED_BACK: |
| // A no op |
| break; |
| default: |
| throw new IllegalStateException("The transaction is in an unkown state"); |
| } |
| } |
| |
| @Override |
| protected void safeSetRollbackOnly() { |
| TransactionStatus status = tranStatus.get(); |
| switch (status) { |
| case ACTIVE: |
| case MARKED_ROLLBACK: |
| if(!tranStatus.compareAndSet(status, MARKED_ROLLBACK)) |
| safeSetRollbackOnly(); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| @Override |
| public TransactionStatus getTransactionStatus() { |
| return tranStatus.get(); |
| } |
| |
| @Override |
| public void preCompletion(Runnable job) throws IllegalStateException { |
| if (tranStatus.get().compareTo(MARKED_ROLLBACK) > 0) { |
| throw new IllegalStateException("The current transaction is in state " + tranStatus); |
| } |
| |
| preCompletion.add(job); |
| } |
| |
| @Override |
| public void postCompletion(Consumer<TransactionStatus> job) throws IllegalStateException { |
| TransactionStatus status = tranStatus.get(); |
| if (status == COMMITTED || status == ROLLED_BACK) { |
| throw new IllegalStateException("The current transaction is in state " + tranStatus); |
| } |
| |
| postCompletion.add(job); |
| } |
| |
| @Override |
| public void registerXAResource(XAResource resource) { |
| throw new IllegalStateException("Not an XA manager"); |
| } |
| |
| @Override |
| public void registerLocalResource(LocalResource resource) { |
| if (tranStatus.get().compareTo(MARKED_ROLLBACK) > 0) { |
| throw new IllegalStateException("The current transaction is in state " + tranStatus); |
| } |
| resources.add(resource); |
| } |
| |
| @Override |
| public boolean supportsXA() { |
| return false; |
| } |
| |
| @Override |
| public boolean supportsLocal() { |
| return true; |
| } |
| |
| @Override |
| public boolean isReadOnly() { |
| return readOnly; |
| } |
| |
| @Override |
| protected boolean isAlive() { |
| TransactionStatus status = tranStatus.get(); |
| return status != COMMITTED && status != ROLLED_BACK; |
| } |
| |
| @Override |
| public void finish() { |
| |
| beforeCompletion(() -> setRollbackOnly()); |
| |
| TransactionStatus status; |
| |
| if (getRollbackOnly()) { |
| vanillaRollback(); |
| status = ROLLED_BACK; |
| } else { |
| tranStatus.set(COMMITTING); |
| |
| List<LocalResource> committed = new ArrayList<>(resources.size()); |
| List<LocalResource> rolledback = new ArrayList<>(0); |
| |
| resources.stream().forEach(lr -> { |
| try { |
| if (getRollbackOnly()) { |
| lr.rollback(); |
| rolledback.add(lr); |
| } else { |
| lr.commit(); |
| committed.add(lr); |
| } |
| } catch (Exception e) { |
| firstUnexpectedException.compareAndSet(null, e); |
| if (committed.isEmpty()) { |
| tranStatus.set(ROLLING_BACK); |
| } |
| rolledback.add(lr); |
| } |
| }); |
| status = tranStatus.updateAndGet(ts -> ts == ROLLING_BACK ? ROLLED_BACK : COMMITTED); |
| } |
| afterCompletion(status); |
| } |
| |
| private void vanillaRollback() { |
| |
| tranStatus.set(ROLLING_BACK); |
| |
| resources.stream().forEach(lr -> { |
| try { |
| lr.rollback(); |
| } catch (Exception e) { |
| // TODO log this |
| recordFailure(e); |
| } |
| }); |
| |
| tranStatus.set(ROLLED_BACK); |
| } |
| } |