Examples with Item com.amazonaws.services.dynamodbv2.document.Item used on opensource projects

Example 76 with Item

use of com.amazonaws.services.dynamodbv2.document.Item 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 77 with Item

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

the class TryDaxHelper method writeData.

void writeData(String tableName, DynamoDB client, int pkmax, int skmax) {
    Table table = client.getTable(tableName);
    System.out.println("Writing data to the table...");
    int stringSize = 1000;
    StringBuilder sb = new StringBuilder(stringSize);
    for (int i = 0; i < stringSize; i++) {
        sb.append('X');
    }
    String someData = sb.toString();
    try {
        for (Integer ipk = 1; ipk <= pkmax; ipk++) {
            System.out.println(("Writing " + skmax + " items for partition key: " + ipk));
            for (Integer isk = 1; isk <= skmax; isk++) {
                table.putItem(new Item().withPrimaryKey("pk", ipk, "sk", isk).withString("someData", someData));
            }
        }
    } catch (Exception e) {
        System.err.println("Unable to write item:");
        e.printStackTrace();
    }
}

Example 78 with Item

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

the class DeleteItem method main.

public static void main(String[] args) {
    final String USAGE = "\n" + "Usage:\n" + "    DeleteItem <table> <name>\n\n" + "Where:\n" + "    table - the table to delete the item from.\n" + "    name  - the item to delete from the table,\n" + "            using the primary key \"Name\"\n\n" + "Example:\n" + "    DeleteItem HelloTable World\n\n" + "**Warning** This program will actually delete the item\n" + "            that you specify!\n";
    if (args.length < 2) {
        System.out.println(USAGE);
        System.exit(1);
    }
    String table_name = args[0];
    String name = args[1];
    System.out.format("Deleting item \"%s\" from %s\n", name, table_name);
    HashMap<String, AttributeValue> key_to_get = new HashMap<String, AttributeValue>();
    key_to_get.put("Name", new AttributeValue(name));
    final AmazonDynamoDB ddb = AmazonDynamoDBClientBuilder.defaultClient();
    try {
        ddb.deleteItem(table_name, key_to_get);
    } catch (AmazonServiceException e) {
        System.err.println(e.getErrorMessage());
        System.exit(1);
    }
    System.out.println("Done!");
}

Example 79 with Item

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

the class DescribeTable method main.

public static void main(String[] args) {
    final String USAGE = "\n" + "Usage:\n" + "    DescribeTable <table>\n\n" + "Where:\n" + "    table - the table to get information about.\n\n" + "Example:\n" + "    DescribeTable HelloTable\n";
    if (args.length < 1) {
        System.out.println(USAGE);
        System.exit(1);
    }
    String table_name = args[0];
    System.out.format("Getting description for %s\n\n", table_name);
    final AmazonDynamoDB ddb = AmazonDynamoDBClientBuilder.defaultClient();
    try {
        TableDescription table_info = ddb.describeTable(table_name).getTable();
        if (table_info != null) {
            System.out.format("Table name  : %s\n", table_info.getTableName());
            System.out.format("Table ARN   : %s\n", table_info.getTableArn());
            System.out.format("Status      : %s\n", table_info.getTableStatus());
            System.out.format("Item count  : %d\n", table_info.getItemCount().longValue());
            System.out.format("Size (bytes): %d\n", table_info.getTableSizeBytes().longValue());
            ProvisionedThroughputDescription throughput_info = table_info.getProvisionedThroughput();
            System.out.println("Throughput");
            System.out.format("  Read Capacity : %d\n", throughput_info.getReadCapacityUnits().longValue());
            System.out.format("  Write Capacity: %d\n", throughput_info.getWriteCapacityUnits().longValue());
            List<AttributeDefinition> attributes = table_info.getAttributeDefinitions();
            System.out.println("Attributes");
            for (AttributeDefinition a : attributes) {
                System.out.format("  %s (%s)\n", a.getAttributeName(), a.getAttributeType());
            }
        }
    } catch (AmazonServiceException e) {
        System.err.println(e.getErrorMessage());
        System.exit(1);
    }
    System.out.println("\nDone!");
}

Example 80 with Item

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

the class TryDaxTests method queryTest.

void queryTest(String tableName, DynamoDB client, int pk, int sk1, int sk2, int iterations) {
    long startTime, endTime;
    System.out.println("Query test - partition key " + pk + " and sort keys between " + sk1 + " and " + sk2);
    Table table = client.getTable(tableName);
    HashMap<String, Object> valueMap = new HashMap<String, Object>();
    valueMap.put(":pkval", pk);
    valueMap.put(":skval1", sk1);
    valueMap.put(":skval2", sk2);
    QuerySpec spec = new QuerySpec().withKeyConditionExpression("pk = :pkval and sk between :skval1 and :skval2").withValueMap(valueMap);
    for (int i = 0; i < iterations; i++) {
        startTime = System.nanoTime();
        ItemCollection<QueryOutcome> items = table.query(spec);
        try {
            Iterator<Item> iter = items.iterator();
            while (iter.hasNext()) {
                iter.next();
            }
        } catch (Exception e) {
            System.err.println("Unable to query table:");
            e.printStackTrace();
        }
        endTime = System.nanoTime();
        printTime(startTime, endTime, iterations);
    }
}