apoc.monitor.Store Maven / Gradle / Ivy

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A collection of useful Neo4j Procedures

There is a newer version: 4.4.0.32

package apoc.monitor;

import apoc.Extended;
import apoc.result.StoreInfoResult;
import org.apache.commons.io.FileUtils;

import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.io.layout.recordstorage.RecordDatabaseLayout;
import org.neo4j.kernel.database.Database;
import org.neo4j.kernel.internal.GraphDatabaseAPI;
import org.neo4j.procedure.Context;
import org.neo4j.procedure.Description;
import org.neo4j.procedure.Procedure;

import java.io.File;
import java.util.stream.Stream;

@Extended
public class Store {

    @Context
    public GraphDatabaseService db;

    @Procedure
    @Description("apoc.monitor.store() returns informations about the sizes of the different parts of the neo4j graph store")
    public Stream store() {

        Database database = ((GraphDatabaseAPI) db).getDependencyResolver().resolveDependency(Database.class);
        //This will work only on Record format databases. Has to be updated when any additional format is available
        RecordDatabaseLayout databaseLayout = RecordDatabaseLayout.cast( database.getDatabaseLayout() );
        return Stream.of(new StoreInfoResult(
                getDirectorySize(databaseLayout.getTransactionLogsDirectory().toFile()),
                databaseLayout.propertyStringStore().toFile().length(),
                databaseLayout.propertyArrayStore().toFile().length(),
                databaseLayout.relationshipStore().toFile().length(),
                databaseLayout.propertyStore().toFile().length(),
                getDirectorySize(databaseLayout.databaseDirectory().toFile()), //databaseLayout.storeFiles().stream().mapToLong(File::length).sum(),
                databaseLayout.nodeStore().toFile().length()
        ));
    }

    private long getDirectorySize(File folder) {
        return folder.exists() ? FileUtils.sizeOfDirectory(folder) : 0;
    }


}