com.infomaximum.database.domainobject.DomainObjectSource Maven / Gradle / Ivy

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package com.infomaximum.database.domainobject;

import com.infomaximum.database.exception.DatabaseException;
import com.infomaximum.database.provider.DBIterator;
import com.infomaximum.database.provider.DBProvider;
import com.infomaximum.database.schema.StructEntity;

public class DomainObjectSource extends DataEnumerable {

    @FunctionalInterface
    public interface Monad {

        /**
         * Реализация операции.
         * @param transaction Контекст, в котором выполняется операция.
         * @throws Exception Если во время выполнения операции возникла ошибка.
         */
        void action(final Transaction transaction) throws Exception;
    }

    @FunctionalInterface
    public interface Function {

        /**
         * Реализация операции.
         * @param transaction Контекст, в котором выполняется операция.
         * @throws Exception Если во время выполнения операции возникла ошибка.
         */
        R apply(final Transaction transaction) throws Exception;
    }

    public DomainObjectSource(DBProvider dbProvider, Boolean reloadSchema) {
        super(dbProvider, reloadSchema);
    }

    public void executeTransactional(final Monad operation) throws Exception {
        try (Transaction transaction = buildTransaction(true)) {
            operation.action(transaction);
            transaction.commit();
        }
    }

    public  R executeFunctionTransactional(final Function operation) throws Exception {
        try (Transaction transaction = buildTransaction()) {
            R result = operation.apply(transaction);
            transaction.commit();
            return result;
        }
    }

    public Transaction buildTransaction() {
        return new Transaction(getDbProvider(), false);
    }

    public Transaction buildTransaction(Boolean reloadSchema) {
        return new Transaction(getDbProvider(), reloadSchema);
    }

    @Override
    public DBIterator createIterator(String columnFamily) throws DatabaseException {
        return getDbProvider().createIterator(columnFamily);
    }

    @Override
    public boolean isMarkedForDeletion(StructEntity entity, long objId) {
        return false;
    }
}