com.aconex.scrutineer.DeletionVerifier Maven / Gradle / Ivy

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Compares 2 streams of Ids and Versions to prove that a secondary source is in sync with a primary source of truth. Designed to verify an elasticsearch cluster contains correct information from a JDBC source.

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package com.aconex.scrutineer;

import java.util.Iterator;

public class DeletionVerifier {
    private final IdAndVersionStream primaryStream;
    private final ExistenceChecker existenceChecker;
    private final IdAndVersionStreamVerifierListener listener;

    public DeletionVerifier(IdAndVersionStream primaryStream, ExistenceChecker existenceChecker, IdAndVersionStreamVerifierListener listener) {
        this.primaryStream = primaryStream;
        this.existenceChecker = existenceChecker;
        this.listener = listener;
    }

    public void verify() {
        primaryStream.open();

        try {
            Iterator iterator = primaryStream.iterator();
            iterateAndCheck(iterator);

        } finally {
            primaryStream.close();
        }
    }

    private void iterateAndCheck(Iterator iterator) {
        while (iterator.hasNext()) {
            IdAndVersion idAndVersion = iterator.next();
            if (existenceChecker.exists(idAndVersion)) {
                listener.onMissingInPrimaryStream(idAndVersion);
            }
        }
    }
}