Examples with AmazonDynamoDB com.amazonaws.services.dynamodbv2.AmazonDynamoDB used on opensource projects

Example 31 with AmazonDynamoDB

use of com.amazonaws.services.dynamodbv2.AmazonDynamoDB in project aws-doc-sdk-examples by awsdocs.

the class MoviesItemOps06 method main.

public static void main(String[] args) throws Exception {
    AmazonDynamoDB client = AmazonDynamoDBClientBuilder.standard().withEndpointConfiguration(new AwsClientBuilder.EndpointConfiguration("http://localhost:8000", "us-west-2")).build();
    DynamoDB dynamoDB = new DynamoDB(client);
    Table table = dynamoDB.getTable("Movies");
    int year = 2015;
    String title = "The Big New Movie";
    DeleteItemSpec deleteItemSpec = new DeleteItemSpec().withPrimaryKey(new PrimaryKey("year", year, "title", title)).withConditionExpression("info.rating <= :val").withValueMap(new ValueMap().withNumber(":val", 5.0));
    try {
        System.out.println("Attempting a conditional delete...");
        table.deleteItem(deleteItemSpec);
        System.out.println("DeleteItem succeeded");
    } catch (Exception e) {
        System.err.println("Unable to delete item: " + year + " " + title);
        System.err.println(e.getMessage());
    }
}

Example 32 with AmazonDynamoDB

use of com.amazonaws.services.dynamodbv2.AmazonDynamoDB in project aws-doc-sdk-examples by awsdocs.

the class MoviesQuery method main.

public static void main(String[] args) throws Exception {
    AmazonDynamoDB client = AmazonDynamoDBClientBuilder.standard().withEndpointConfiguration(new AwsClientBuilder.EndpointConfiguration("http://localhost:8000", "us-west-2")).build();
    DynamoDB dynamoDB = new DynamoDB(client);
    Table table = dynamoDB.getTable("Movies");
    HashMap<String, String> nameMap = new HashMap<String, String>();
    nameMap.put("#yr", "year");
    HashMap<String, Object> valueMap = new HashMap<String, Object>();
    valueMap.put(":yyyy", 1985);
    QuerySpec querySpec = new QuerySpec().withKeyConditionExpression("#yr = :yyyy").withNameMap(nameMap).withValueMap(valueMap);
    ItemCollection<QueryOutcome> items = null;
    Iterator<Item> iterator = null;
    Item item = null;
    try {
        System.out.println("Movies from 1985");
        items = table.query(querySpec);
        iterator = items.iterator();
        while (iterator.hasNext()) {
            item = iterator.next();
            System.out.println(item.getNumber("year") + ": " + item.getString("title"));
        }
    } catch (Exception e) {
        System.err.println("Unable to query movies from 1985");
        System.err.println(e.getMessage());
    }
    valueMap.put(":yyyy", 1992);
    valueMap.put(":letter1", "A");
    valueMap.put(":letter2", "L");
    querySpec.withProjectionExpression("#yr, title, info.genres, info.actors[0]").withKeyConditionExpression("#yr = :yyyy and title between :letter1 and :letter2").withNameMap(nameMap).withValueMap(valueMap);
    try {
        System.out.println("Movies from 1992 - titles A-L, with genres and lead actor");
        items = table.query(querySpec);
        iterator = items.iterator();
        while (iterator.hasNext()) {
            item = iterator.next();
            System.out.println(item.getNumber("year") + ": " + item.getString("title") + " " + item.getMap("info"));
        }
    } catch (Exception e) {
        System.err.println("Unable to query movies from 1992:");
        System.err.println(e.getMessage());
    }
}

Example 33 with AmazonDynamoDB

use of com.amazonaws.services.dynamodbv2.AmazonDynamoDB in project aws-doc-sdk-examples by awsdocs.

the class PutItem method main.

public static void main(String[] args) {
    final String USAGE = "\n" + "Usage:\n" + "    PutItem <table> <name> [field=value ...]\n\n" + "Where:\n" + "    table    - the table to put the item in.\n" + "    name     - a name to add to the table. If the name already\n" + "               exists, its entry will be updated.\n" + "Additional fields can be added by appending them to the end of the\n" + "input.\n\n" + "Example:\n" + "    PutItem Cellists Pau Language=ca Born=1876\n";
    if (args.length < 2) {
        System.out.println(USAGE);
        System.exit(1);
    }
    String table_name = args[0];
    String name = args[1];
    ArrayList<String[]> extra_fields = new ArrayList<String[]>();
    // any additional args (fields to add to database)?
    for (int x = 2; x < args.length; x++) {
        String[] fields = args[x].split("=", 2);
        if (fields.length == 2) {
            extra_fields.add(fields);
        } else {
            System.out.format("Invalid argument: %s\n", args[x]);
            System.out.println(USAGE);
            System.exit(1);
        }
    }
    System.out.format("Adding \"%s\" to \"%s\"", name, table_name);
    if (extra_fields.size() > 0) {
        System.out.println("Additional fields:");
        for (String[] field : extra_fields) {
            System.out.format("  %s: %s\n", field[0], field[1]);
        }
    }
    HashMap<String, AttributeValue> item_values = new HashMap<String, AttributeValue>();
    item_values.put("Name", new AttributeValue(name));
    for (String[] field : extra_fields) {
        item_values.put(field[0], new AttributeValue(field[1]));
    }
    final AmazonDynamoDB ddb = AmazonDynamoDBClientBuilder.defaultClient();
    try {
        ddb.putItem(table_name, item_values);
    } catch (ResourceNotFoundException e) {
        System.err.format("Error: The table \"%s\" can't be found.\n", table_name);
        System.err.println("Be sure that it exists and that you've typed its name correctly!");
        System.exit(1);
    } catch (AmazonServiceException e) {
        System.err.println(e.getMessage());
        System.exit(1);
    }
    System.out.println("Done!");
}

Example 34 with AmazonDynamoDB

use of com.amazonaws.services.dynamodbv2.AmazonDynamoDB in project aws-doc-sdk-examples by awsdocs.

the class UseDynamoMapping method main.

public static void main(String[] args) {
    final String USAGE = "\n" + "To run this example, supply the following values: \n" + "artist name \n" + "song title \n" + "album title \n" + "number of awards \n";
    if (args.length < 4) {
        System.out.println(USAGE);
        System.exit(1);
    }
    String artist = args[0];
    String songTitle = args[1];
    String albumTitle = args[2];
    String awards = args[3];
    // snippet-start:[dynamodb.java.dynamoDB_mapping.main]
    AmazonDynamoDB client = AmazonDynamoDBClientBuilder.standard().build();
    MusicItems items = new MusicItems();
    try {
        // Add new content to the Music table
        items.setArtist(artist);
        items.setSongTitle(songTitle);
        items.setAlbumTitle(albumTitle);
        // convert to an int
        items.setAwards(Integer.parseInt(awards));
        // Save the item
        DynamoDBMapper mapper = new DynamoDBMapper(client);
        mapper.save(items);
        // Load an item based on the Partition Key and Sort Key
        // Both values need to be passed to the mapper.load method
        String artistName = artist;
        String songQueryTitle = songTitle;
        // Retrieve the item
        MusicItems itemRetrieved = mapper.load(MusicItems.class, artistName, songQueryTitle);
        System.out.println("Item retrieved:");
        System.out.println(itemRetrieved);
        // Modify the Award value
        itemRetrieved.setAwards(2);
        mapper.save(itemRetrieved);
        System.out.println("Item updated:");
        System.out.println(itemRetrieved);
        System.out.print("Done");
    } catch (AmazonDynamoDBException e) {
        e.getStackTrace();
    }
}

Example 35 with AmazonDynamoDB

use of com.amazonaws.services.dynamodbv2.AmazonDynamoDB in project aws-doc-sdk-examples by awsdocs.

the class CreateTable method main.

public static void main(String[] args) {
    final String USAGE = "\n" + "Usage:\n" + "    CreateTable <table>\n\n" + "Where:\n" + "    table - the table to create.\n\n" + "Example:\n" + "    CreateTable HelloTable\n";
    if (args.length < 1) {
        System.out.println(USAGE);
        System.exit(1);
    }
    /* Read the name from command args */
    String table_name = args[0];
    System.out.format("Creating table \"%s\" with a simple primary key: \"Name\".\n", table_name);
    CreateTableRequest request = new CreateTableRequest().withAttributeDefinitions(new AttributeDefinition("Name", ScalarAttributeType.S)).withKeySchema(new KeySchemaElement("Name", KeyType.HASH)).withProvisionedThroughput(new ProvisionedThroughput(new Long(10), new Long(10))).withTableName(table_name);
    final AmazonDynamoDB ddb = AmazonDynamoDBClientBuilder.defaultClient();
    try {
        CreateTableResult result = ddb.createTable(request);
        System.out.println(result.getTableDescription().getTableName());
    } catch (AmazonServiceException e) {
        System.err.println(e.getErrorMessage());
        System.exit(1);
    }
    System.out.println("Done!");
}