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

Example 61 with Table

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

the class LowLevelLocalSecondaryIndexExample method waitForTableToBecomeAvailable.

private static void waitForTableToBecomeAvailable(String tableName) {
    System.out.println("Waiting for " + tableName + " to become ACTIVE...");
    long startTime = System.currentTimeMillis();
    long endTime = startTime + (10 * 60 * 1000);
    while (System.currentTimeMillis() < endTime) {
        DescribeTableRequest request = new DescribeTableRequest().withTableName(tableName);
        TableDescription tableDescription = client.describeTable(request).getTable();
        String tableStatus = tableDescription.getTableStatus();
        System.out.println("  - current state: " + tableStatus);
        if (tableStatus.equals(TableStatus.ACTIVE.toString()))
            return;
        try {
            Thread.sleep(1000 * 20);
        } catch (Exception e) {
        }
    }
    throw new RuntimeException("Table " + tableName + " never went active");
}

Example 62 with Table

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

the class LowLevelLocalSecondaryIndexExample method query.

public static void query(String indexName) {
    System.out.println("\n***********************************************************\n");
    System.out.println("Querying table " + tableName + "...");
    QueryRequest queryRequest = new QueryRequest().withTableName(tableName).withConsistentRead(true).withScanIndexForward(true).withReturnConsumedCapacity(ReturnConsumedCapacity.TOTAL);
    HashMap<String, Condition> keyConditions = new HashMap<String, Condition>();
    keyConditions.put("CustomerId", new Condition().withComparisonOperator(ComparisonOperator.EQ).withAttributeValueList(new AttributeValue().withS("bob@example.com")));
    if (indexName == "IsOpenIndex") {
        System.out.println("\nUsing index: '" + indexName + "': Bob's orders that are open.");
        System.out.println("Only a user-specified list of attributes are returned\n");
        queryRequest.setIndexName(indexName);
        keyConditions.put("IsOpen", new Condition().withComparisonOperator(ComparisonOperator.EQ).withAttributeValueList(new AttributeValue().withN("1")));
        // ProjectionExpression
        queryRequest.setProjectionExpression("OrderCreationDate, ProductCategory, ProductName, OrderStatus");
    } else if (indexName == "OrderCreationDateIndex") {
        System.out.println("\nUsing index: '" + indexName + "': Bob's orders that were placed after 01/31/2013.");
        System.out.println("Only the projected attributes are returned\n");
        queryRequest.setIndexName(indexName);
        keyConditions.put("OrderCreationDate", new Condition().withComparisonOperator(ComparisonOperator.GT).withAttributeValueList(new AttributeValue().withN("20130131")));
        // Select
        queryRequest.setSelect(Select.ALL_PROJECTED_ATTRIBUTES);
    } else {
        System.out.println("\nNo index: All of Bob's orders, by OrderId:\n");
    }
    queryRequest.setKeyConditions(keyConditions);
    QueryResult result = client.query(queryRequest);
    List<Map<String, AttributeValue>> items = result.getItems();
    Iterator<Map<String, AttributeValue>> itemsIter = items.iterator();
    while (itemsIter.hasNext()) {
        Map<String, AttributeValue> currentItem = itemsIter.next();
        Iterator<String> currentItemIter = currentItem.keySet().iterator();
        while (currentItemIter.hasNext()) {
            String attr = (String) currentItemIter.next();
            if (attr == "OrderId" || attr == "IsOpen" || attr == "OrderCreationDate") {
                System.out.println(attr + "---> " + currentItem.get(attr).getN());
            } else {
                System.out.println(attr + "---> " + currentItem.get(attr).getS());
            }
        }
        System.out.println();
    }
    System.out.println("\nConsumed capacity: " + result.getConsumedCapacity() + "\n");
}

Example 63 with Table

use of com.amazonaws.services.dynamodbv2.document.Table 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 64 with Table

use of com.amazonaws.services.dynamodbv2.document.Table 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 65 with Table

use of com.amazonaws.services.dynamodbv2.document.Table 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);
    }
}