001/**
002 * Copyright (C) 2006-2025 Talend Inc. - www.talend.com
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.talend.sdk.component.runtime.input;
017
018import java.util.function.Consumer;
019
020import org.talend.sdk.component.runtime.base.Lifecycle;
021
022public interface Input extends Lifecycle {
023
024    Object next();
025
026    /**
027     * Start the input with a checkpoint callback feature and resuming state.
028     */
029    default void start(final Consumer<CheckpointState> checkpointCallback) {
030        throw new UnsupportedOperationException("#start()");
031    }
032
033    /**
034     * Retrieve the current checkpoint.
035     */
036    default CheckpointState getCheckpoint() {
037        throw new UnsupportedOperationException("#getCheckpoint()");
038    }
039
040    /**
041     * Is a new checkpoint available.
042     */
043    default boolean isCheckpointReady() {
044        throw new UnsupportedOperationException("#isCheckpointReady()");
045    }
046
047}