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pg-index-health-jdbc-connection is an abstraction of a connection to a high availability PostgreSQL cluster.

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/*
 * Copyright (c) 2019-2024. Ivan Vakhrushev and others.
 * https://github.com/mfvanek/pg-index-health
 *
 * This file is a part of "pg-index-health" - a Java library for
 * analyzing and maintaining indexes health in PostgreSQL databases.
 *
 * Licensed under the Apache License 2.0
 */

package io.github.mfvanek.pg.connection;

import java.util.Objects;
import javax.annotation.Nonnull;
import javax.sql.DataSource;

/**
 * A standard implementation of {@code PgConnection} interface with awareness of real host.
 *
 * @author Ivan Vakhrushev
 * @see PgConnection
 */
public class PgConnectionImpl implements PgConnection {

    private final DataSource dataSource;
    private final PgHost host;

    private PgConnectionImpl(@Nonnull final DataSource dataSource, @Nonnull final PgHost host) {
        this.dataSource = Objects.requireNonNull(dataSource, "dataSource cannot be null");
        this.host = Objects.requireNonNull(host, "host cannot be null");
    }

    /**
     * {@inheritDoc}
     */
    @Override
    @Nonnull
    public DataSource getDataSource() {
        return dataSource;
    }

    /**
     * {@inheritDoc}
     */
    @Nonnull
    @Override
    public PgHost getHost() {
        return host;
    }

    /**
     * Constructs a {@code PgConnection} object with given dataSource and host.
     *
     * @param dataSource a factory for connections to the physical database
     * @param host       information about database host
     * @return {@code PgConnection}
     * @see DataSource
     * @see PgHost
     */
    @Nonnull
    public static PgConnection of(@Nonnull final DataSource dataSource, @Nonnull final PgHost host) {
        return new PgConnectionImpl(dataSource, host);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public final boolean equals(final Object other) {
        if (this == other) {
            return true;
        }

        if (!(other instanceof PgConnection)) {
            return false;
        }

        final PgConnection that = (PgConnection) other;
        return Objects.equals(host, that.getHost());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public final int hashCode() {
        return Objects.hash(host);
    }

    /**
     * {@inheritDoc}
     */
    @Nonnull
    @Override
    public String toString() {
        return PgConnectionImpl.class.getSimpleName() + '{' +
            "host=" + host +
            '}';
    }
}