Examples of com.sleepycat.je.Environment.checkpoint()

com.sleepycat.je.Environment.checkpoint()
Synchronously checkpoint the database environment.
This is an optional action for the application since this activity is, by default, handled by a database environment owned background thread.
A checkpoint has the side effect of flushing all preceding non-transactional write operations, as well as any preceding transactions that were committed with {@link Durability.SyncPolicy#NO_SYNC no-sync durability}. However, for best performance, checkpoints should be used only to bound recovery time. {@link #flushLog} can be used to write buffered data for durabilitypurposes. @param ckptConfig The checkpoint attributes. If null, defaultattributes are used. @throws EnvironmentFailureException if an unexpected, internal orenvironment-wide failure occurs. @throws IllegalStateException if this handle or the underlyingenvironment has been closed.

            } while(cleaned > 0);
            if(cleaned > 0)
                System.out.println("Cleaned " + cleaned + " files.");
            CheckpointConfig cp = new CheckpointConfig();
            cp.setForce(true);
            environment.checkpoint(null);
            environment.compress();
            environment.sync();
            System.out.println("Cleaning, Checkpointing and compression completed.");
        }

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                    System.out.println("Files cleaned: " + nFiles);
                    if (nFiles == 0) {
                        break;
                    }
                }
                env.checkpoint(forceConfig);
                break;
            case COMPRESS:
                env.compress();
                break;
            case CHECKPOINT:

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                break;
            case COMPRESS:
                env.compress();
                break;
            case CHECKPOINT:
                env.checkpoint(forceConfig);
                break;
            case EVICT:
                preload(env, dbName);
                break;
            case REMOVEDB:

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                    System.out.println("Files cleaned: " + nFiles);
                    if (nFiles == 0) {
                        break;
                    }
                }
                env.checkpoint(forceConfig);
                break;
            case COMPRESS:
                env.compress();
                break;
            case EVICT:

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                break;
            case EVICT:
                preload(env, dbName);
                break;
            case CHECKPOINT:
                env.checkpoint(forceConfig);
                break;
            case REMOVEDB:
                env.removeDatabase(null, dbName);
                break;
            case DBSTATS:

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             */
            CheckpointConfig checkpointConfig = new CheckpointConfig();


            /* Should not cause a checkpoint, too little growth. */
            checkpointConfig.setKBytes(1);
            env.checkpoint(checkpointConfig);
            stats = env.getStats(statsConfig);  // read again
            assertEquals(0, stats.getNCheckpoints());


            /* Fill up the log, there should be a checkpoint. */
            String filler = "123456789012345678901245678901234567890123456789";

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            String filler = "123456789012345678901245678901234567890123456789";
            EnvironmentImpl envImpl = DbInternal.envGetEnvironmentImpl(env);
            for (int i = 0; i < 20; i++) {
                Tracer.trace(Level.SEVERE, envImpl, filler);
            }
            env.checkpoint(checkpointConfig);
            stats = env.getStats(statsConfig);  // read again
            assertEquals(1, stats.getNCheckpoints());


            /* Try time based, should not checkpoint. */
            checkpointConfig.setKBytes(0);

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            assertEquals(1, stats.getNCheckpoints());


            /* Try time based, should not checkpoint. */
            checkpointConfig.setKBytes(0);
            checkpointConfig.setMinutes(1);
            env.checkpoint(checkpointConfig);
            stats = env.getStats(statsConfig);  // read again
            assertEquals(0, stats.getNCheckpoints());


            /* 
       * Sleep, enough time has passed for a checkpoint, but nothing was

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            /* 
       * Sleep, enough time has passed for a checkpoint, but nothing was
       * written to the log.
             */
            Thread.sleep(1000);
            env.checkpoint(checkpointConfig);
            stats = env.getStats(statsConfig);  // read again
            assertEquals(0, stats.getNCheckpoints());


            /* Log something, now try a checkpoint. */
            Tracer.trace(Level.SEVERE,  envImpl, filler);

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            stats = env.getStats(statsConfig);  // read again
            assertEquals(0, stats.getNCheckpoints());


            /* Log something, now try a checkpoint. */
            Tracer.trace(Level.SEVERE,  envImpl, filler);
            env.checkpoint(checkpointConfig);
            stats = env.getStats(statsConfig);  // read again
            // TODO: make this test more timing independent. Sometimes 
            // the assertion will fail.
            // assertEquals(1, stats.getNCheckpoints());

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