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Utils.java
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Utils.java
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/*
* Copyright 2016 Google 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 com.example.appengine.search;
// [START index_import]
import com.google.appengine.api.search.Document;
import com.google.appengine.api.search.Index;
import com.google.appengine.api.search.IndexSpec;
import com.google.appengine.api.search.PutException;
import com.google.appengine.api.search.SearchServiceFactory;
import com.google.appengine.api.search.StatusCode;
// [END index_import]
/**
* A utility class for the search API sample.
*/
public class Utils {
/**
* Put a given document into an index with the given indexName.
*
* @param indexName The name of the index.
* @param document A document to add.
* @throws InterruptedException When Thread.sleep is interrupted.
*/
// [START putting_document_with_retry]
@SuppressWarnings("checkstyle:AbbreviationAsWordInName")
public static void indexADocument(String indexName, Document document)
throws InterruptedException {
IndexSpec indexSpec = IndexSpec.newBuilder().setName(indexName).build();
Index index = SearchServiceFactory.getSearchService().getIndex(indexSpec);
final int maxRetry = 3;
int attempts = 0;
int delay = 2;
while (true) {
try {
index.put(document);
} catch (PutException e) {
if (StatusCode.TRANSIENT_ERROR.equals(e.getOperationResult().getCode())
&& ++attempts < maxRetry) { // retrying
Thread.sleep(delay * 1000);
delay *= 2; // easy exponential backoff
continue;
} else {
throw e; // otherwise throw
}
}
break;
}
}
// [END putting_document_with_retry]
}