/*
* Copyright 2014-2015 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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.amazonaws.codesamples.datamodeling;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient;
import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBAttribute;
import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBHashKey;
import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBMapper;
import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBMapperConfig;
import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBRangeKey;
import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBTable;
public class ObjectPersistenceBatchWriteExample {
static AmazonDynamoDBClient client = new AmazonDynamoDBClient(new ProfileCredentialsProvider());
static SimpleDateFormat dateFormatter = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
public static void main(String[] args) throws Exception {
try {
DynamoDBMapper mapper = new DynamoDBMapper(client);
testBatchSave(mapper);
testBatchDelete(mapper);
testBatchWrite(mapper);
System.out.println("Example complete!");
} catch (Throwable t) {
System.err.println("Error running the ObjectPersistenceBatchWriteExample: " + t);
t.printStackTrace();
}
}
private static void testBatchSave(DynamoDBMapper mapper) {
Book book1 = new Book();
book1.id = 901;
book1.inPublication = true;
book1.ISBN = "902-11-11-1111";
book1.pageCount = 100;
book1.price = 10;
book1.productCategory = "Book";
book1.title = "My book created in batch write";
Book book2 = new Book();
book2.id = 902;
book2.inPublication = true;
book2.ISBN = "902-11-12-1111";
book2.pageCount = 200;
book2.price = 20;
book2.productCategory = "Book";
book2.title = "My second book created in batch write";
Book book3 = new Book();
book3.id = 903;
book3.inPublication = false;
book3.ISBN = "902-11-13-1111";
book3.pageCount = 300;
book3.price = 25;
book3.productCategory = "Book";
book3.title = "My third book created in batch write";
System.out.println("Adding three books to ProductCatalog table.");
mapper.batchSave(Arrays.asList(book1, book2, book3));
}
private static void testBatchDelete(DynamoDBMapper mapper) {
Book book1 = mapper.load(Book.class, 901);
Book book2 = mapper.load(Book.class, 902);
System.out.println("Deleting two books from the ProductCatalog table.");
mapper.batchDelete(Arrays.asList(book1, book2));
}
private static void testBatchWrite(DynamoDBMapper mapper) {
// Create Forum item to save
Forum forumItem = new Forum();
forumItem.name = "Test BatchWrite Forum";
forumItem.threads = 0;
forumItem.category = "Amazon Web Services";
// Create Thread item to save
Thread threadItem = new Thread();
threadItem.forumName = "AmazonDynamoDB";
threadItem.subject = "My sample question";
threadItem.message = "BatchWrite message";
List<String> tags = new ArrayList<String>();
tags.add("batch operations");
tags.add("write");
threadItem.tags = new HashSet<String>(tags);
// Load ProductCatalog item to delete
Book book3 = mapper.load(Book.class, 903);
List<Object> objectsToWrite = Arrays.asList(forumItem, threadItem);
List<Book> objectsToDelete = Arrays.asList(book3);
DynamoDBMapperConfig config = new DynamoDBMapperConfig(DynamoDBMapperConfig.SaveBehavior.CLOBBER);
mapper.batchWrite(objectsToWrite, objectsToDelete, config);
}
@DynamoDBTable(tableName="ProductCatalog")
public static class Book {
private int id;
private String title;
private String ISBN;
private int price;
private int pageCount;
private String productCategory;
private boolean inPublication;
@DynamoDBHashKey(attributeName="Id")
public int getId() { return id; }
public void setId(int id) { this.id = id; }
@DynamoDBAttribute(attributeName="Title")
public String getTitle() { return title; }
public void setTitle(String title) { this.title = title; }
@DynamoDBAttribute(attributeName="ISBN")
public String getISBN() { return ISBN; }
public void setISBN(String ISBN) { this.ISBN = ISBN; }
@DynamoDBAttribute(attributeName="Price")
public int getPrice() { return price; }
public void setPrice(int price) { this.price = price; }
@DynamoDBAttribute(attributeName="PageCount")
public int getPageCount() { return pageCount; }
public void setPageCount(int pageCount) { this.pageCount = pageCount;}
@DynamoDBAttribute(attributeName="ProductCategory")
public String getProductCategory() { return productCategory; }
public void setProductCategory(String productCategory) { this.productCategory = productCategory; }
@DynamoDBAttribute(attributeName="InPublication")
public boolean getInPublication() { return inPublication; }
public void setInPublication(boolean inPublication) { this.inPublication = inPublication; }
@Override
public String toString() {
return "Book [ISBN=" + ISBN + ", price=" + price
+ ", product category=" + productCategory + ", id=" + id
+ ", title=" + title + "]";
}
}
@DynamoDBTable(tableName="Reply")
public static class Reply {
private String id;
private String replyDateTime;
private String message;
private String postedBy;
@DynamoDBHashKey(attributeName="Id")
public String getId() { return id; }
public void setId(String id) { this.id = id; }
@DynamoDBRangeKey(attributeName="ReplyDateTime")
public String getReplyDateTime() { return replyDateTime; }
public void setReplyDateTime(String replyDateTime) { this.replyDateTime = replyDateTime; }
@DynamoDBAttribute(attributeName="Message")
public String getMessage() { return message; }
public void setMessage(String message) { this.message = message; }
@DynamoDBAttribute(attributeName="PostedBy")
public String getPostedBy() { return postedBy; }
public void setPostedBy(String postedBy) { this.postedBy = postedBy;}
}
@DynamoDBTable(tableName="Thread")
public static class Thread {
private String forumName;
private String subject;
private String message;
private String lastPostedDateTime;
private String lastPostedBy;
private Set<String> tags;
private int answered;
private int views;
private int replies;
@DynamoDBHashKey(attributeName="ForumName")
public String getForumName() { return forumName; }
public void setForumName(String forumName) { this.forumName = forumName; }
@DynamoDBRangeKey(attributeName="Subject")
public String getSubject() { return subject; }
public void setSubject(String subject) { this.subject = subject; }
@DynamoDBAttribute(attributeName="Message")
public String getMessage() { return message; }
public void setMessage(String message) { this.message = message; }
@DynamoDBAttribute(attributeName="LastPostedDateTime")
public String getLastPostedDateTime() { return lastPostedDateTime; }
public void setLastPostedDateTime(String lastPostedDateTime) { this.lastPostedDateTime = lastPostedDateTime; }
@DynamoDBAttribute(attributeName="LastPostedBy")
public String getLastPostedBy() { return lastPostedBy; }
public void setLastPostedBy(String lastPostedBy) { this.lastPostedBy = lastPostedBy;}
@DynamoDBAttribute(attributeName="Tags")
public Set<String> getTags() { return tags; }
public void setTags(Set<String> tags) { this.tags = tags; }
@DynamoDBAttribute(attributeName="Answered")
public int getAnswered() { return answered; }
public void setAnswered(int answered) { this.answered = answered; }
@DynamoDBAttribute(attributeName="Views")
public int getViews() { return views; }
public void setViews(int views) { this.views = views; }
@DynamoDBAttribute(attributeName="Replies")
public int getReplies() { return replies; }
public void setReplies(int replies) { this.replies = replies; }
}
@DynamoDBTable(tableName="Forum")
public static class Forum {
private String name;
private String category;
private int threads;
@DynamoDBHashKey(attributeName="Name")
public String getName() { return name; }
public void setName(String name) { this.name = name; }
@DynamoDBAttribute(attributeName="Category")
public String getCategory() { return category; }
public void setCategory(String category) { this.category = category; }
@DynamoDBAttribute(attributeName="Threads")
public int getThreads() { return threads; }
public void setThreads(int threads) { this.threads = threads;}
}
}
