io.cdap.cdap.internal.app.preview.DirectPreviewRequestFetcher Maven / Gradle / Ivy
/*
* Copyright © 2020 Cask Data, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package io.cdap.cdap.internal.app.preview;
import com.google.inject.Inject;
import io.cdap.cdap.app.preview.PreviewRequest;
import io.cdap.cdap.app.preview.PreviewRequestQueue;
import java.io.IOException;
import java.util.Optional;
/**
* Implementation of {@link PreviewRequestFetcher} which fetches directly from {@link PreviewRequestQueue}.
*/
public class DirectPreviewRequestFetcher implements PreviewRequestFetcher {
private final PreviewRequestQueue previewRequestQueue;
@Inject
DirectPreviewRequestFetcher(PreviewRequestQueue previewRequestQueue) {
this.previewRequestQueue = previewRequestQueue;
}
@Override
public Optional fetch() throws IOException {
return previewRequestQueue.poll(null);
}
}