Added Progress Check interface and test files

Signed-off-by: Krishna Kondaka <[email protected]>

data-prepper-api/src/main/java/org/opensearch/dataprepper/model/acknowledgements/ProgressCheck.java

@@ -0,0 +1,17 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.dataprepper.model.acknowledgements;
+
+public interface ProgressCheck {
+    /**
+     * Returns the pending ratio
+     *
+     * @return returns the ratio of pending to the total acknowledgements
+     * @since 2.6
+     */
+    Double getRatio();
+}
+

data-prepper-core/src/main/java/org/opensearch/dataprepper/acknowledgements/DefaultProgressCheck.java

@@ -0,0 +1,21 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.dataprepper.acknowledgements;
+
+import org.opensearch.dataprepper.model.acknowledgements.ProgressCheck;
+
+public class DefaultProgressCheck implements ProgressCheck {
+    double ratio;
+
+    public DefaultProgressCheck(double ratio) {
+        this.ratio = ratio;
+    }
+
+    @Override
+    public Double getRatio() {
+        return ratio;
+    }
+}