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Extract NeoStoreDataSource diagnostics into separate class
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community/kernel/src/main/java/org/neo4j/kernel/DataSourceDiagnostics.java
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| /* | ||
| * Copyright (c) 2002-2018 "Neo4j," | ||
| * Neo4j Sweden AB [http://neo4j.com] | ||
| * | ||
| * This file is part of Neo4j. | ||
| * | ||
| * Neo4j is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| package org.neo4j.kernel; | ||
|
|
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| import java.io.IOException; | ||
|
|
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| import org.neo4j.kernel.impl.transaction.log.entry.LogHeader; | ||
| import org.neo4j.kernel.impl.transaction.log.files.LogFiles; | ||
| import org.neo4j.kernel.info.DiagnosticsExtractor; | ||
| import org.neo4j.kernel.info.DiagnosticsPhase; | ||
| import org.neo4j.logging.Logger; | ||
|
|
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| enum DataSourceDiagnostics implements DiagnosticsExtractor<NeoStoreDataSource> | ||
| { | ||
| TRANSACTION_RANGE( "Transaction log:" ) | ||
| { | ||
| @Override | ||
| void dump( NeoStoreDataSource source, Logger log ) | ||
| { | ||
| LogFiles logFiles = source.getDependencyResolver().resolveDependency( LogFiles.class ); | ||
| try | ||
| { | ||
| for ( long logVersion = logFiles.getLowestLogVersion(); | ||
| logFiles.versionExists( logVersion ); logVersion++ ) | ||
| { | ||
| if ( logFiles.hasAnyEntries( logVersion ) ) | ||
| { | ||
| LogHeader header = logFiles.extractHeader( logVersion ); | ||
| long firstTransactionIdInThisLog = header.lastCommittedTxId + 1; | ||
| log.log( "Oldest transaction " + firstTransactionIdInThisLog + | ||
| " found in log with version " + logVersion ); | ||
| return; | ||
| } | ||
| } | ||
| log.log( "No transactions found in any log" ); | ||
| } | ||
| catch ( IOException e ) | ||
| { // It's fine, we just tried to be nice and log this. Failing is OK | ||
| log.log( "Error trying to figure out oldest transaction in log" ); | ||
| } | ||
| } | ||
| }; | ||
|
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| private final String message; | ||
|
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| DataSourceDiagnostics( String message ) | ||
| { | ||
| this.message = message; | ||
| } | ||
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| @Override | ||
| public void dumpDiagnostics( final NeoStoreDataSource source, DiagnosticsPhase phase, Logger logger ) | ||
| { | ||
| if ( applicable( phase ) ) | ||
| { | ||
| logger.log( message ); | ||
| dump( source, logger ); | ||
| } | ||
| } | ||
|
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| boolean applicable( DiagnosticsPhase phase ) | ||
| { | ||
| return phase.isInitialization() || phase.isExplicitlyRequested(); | ||
| } | ||
|
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| abstract void dump( NeoStoreDataSource source, Logger logger ); | ||
| } |
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