Examples of com.amazonaws.services.dynamodb.model.WriteRequest

Package com.amazonaws.services.dynamodb.model

Examples of com.amazonaws.services.dynamodb.model.WriteRequest

com.amazonaws.services.dynamodb.model.WriteRequest

This structure is a Union of PutRequest and DeleteRequest. It can contain exactly one of PutRequest or DeleteRequest . Never Both. This is enforced in the code.

        // Test: write items to database
        Map<String, AttributeValue> forumItem = new HashMap<String, AttributeValue>();
        forumItem.put(hashKeyValue1, new AttributeValue().withN("1"));
        forumItem.put("range", new AttributeValue().withS("a"));
        List<WriteRequest> forumList = new ArrayList<WriteRequest>();
        forumList.add(new WriteRequest().withPutRequest(new PutRequest().withItem(forumItem)));


        Map<String, AttributeValue> forumItem1 = new HashMap<String, AttributeValue>();
        forumItem1.put(hashKeyValue1, new AttributeValue().withN("2"));
        forumItem1.put("range", new AttributeValue().withS("b"));
        forumList.add(new WriteRequest().withPutRequest(new PutRequest().withItem(forumItem1)));


        Map<String, AttributeValue> forumItem5 = new HashMap<String, AttributeValue>();
        forumItem5.put(hashKeyValue1, new AttributeValue().withN("3"));
        forumItem5.put("range", new AttributeValue().withS("c"));
        forumList.add(new WriteRequest().withPutRequest(new PutRequest().withItem(forumItem5)));


        Map<String, AttributeValue> forumItem2 = new HashMap<String, AttributeValue>();
        forumItem2.put(hashKeyValue1, new AttributeValue().withN("4"));
        forumItem2.put("range", new AttributeValue().withS("d"));
        forumList.add(new WriteRequest().withPutRequest(new PutRequest().withItem(forumItem2)));


        Map<String, AttributeValue> forumItem3 = new HashMap<String, AttributeValue>();
        forumItem3.put(hashKeyValue1, new AttributeValue().withN("5"));
        forumItem3.put("range", new AttributeValue().withS("e"));
        forumList.add(new WriteRequest().withPutRequest(new PutRequest().withItem(forumItem3)));


        Map<String, AttributeValue> forumItem4 = new HashMap<String, AttributeValue>();
        forumItem4.put(hashKeyValue1, new AttributeValue().withN("6"));
        forumItem4.put("range", new AttributeValue().withS("f"));
        forumList.add(new WriteRequest().withPutRequest(new PutRequest().withItem(forumItem4)));


        //Test case: with duplicated hashkey item but distinguished range key input.
        Map<String, AttributeValue> forumItem6 = new HashMap<String, AttributeValue>();
        forumItem6.put(hashKeyValue1, new AttributeValue().withN("6"));
        forumItem6.put("range", new AttributeValue().withS("ff"));
        forumList.add(new WriteRequest().withPutRequest(new PutRequest().withItem(forumItem6)));


        //Test case: Delete Request
//        forumList.add(new WriteRequest().withDeleteRequest(new DeleteRequest().withKey(new Key(new AttributeValue("7")))));
//        forumList.add(new WriteRequest().withDeleteRequest(new DeleteRequest().withKey(new Key(new AttributeValue("1")))));
//        forumList.add(new WriteRequest().withDeleteRequest(new DeleteRequest().withKey(new Key(new AttributeValue("4")))));
//        forumList.add(new WriteRequest().withDeleteRequest(new DeleteRequest().withKey(new Key(new AttributeValue("5")))));


        //Test case: Duplicated delete request
//        forumList.add(new WriteRequest().withDeleteRequest(new DeleteRequest().withKey(new Key(new AttributeValue("7")))));


        //Test on Table 2
        Map<String, AttributeValue> forumItemT2 = new HashMap<String, AttributeValue>();
        forumItemT2.put(hashKeyValue2, new AttributeValue().withN("1"));
        forumItemT2.put("range", new AttributeValue().withS("a"));
        List<WriteRequest> forumListT2 = new ArrayList<WriteRequest>();
        forumListT2.add(new WriteRequest().withPutRequest(new PutRequest().withItem(forumItemT2)));


        requestItems.put(tableName1, forumList);
        requestItems.put(tableName2, forumListT2);
        do {
            System.out.println("Making the request.");

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            if ( !requestItems.containsKey(tableName) ) {
                requestItems.put(tableName, new LinkedList<WriteRequest>());
            }


            requestItems.get(tableName).add(
                    new WriteRequest().withPutRequest(new PutRequest().withItem(transformAttributes(clazz, attributeValues))));
        }


        for ( Object toDelete : objectsToDelete ) {
            Class<?> clazz = toDelete.getClass();


            String tableName = getTableName(clazz, config);


            Method hashKeyGetter = reflector.getHashKeyGetter(clazz);
            AttributeValue hashKeyElement = getHashKeyElement(safeInvoke(hashKeyGetter, toDelete), hashKeyGetter);


            AttributeValue rangeKeyElement = null;
            Method rangeKeyGetter = reflector.getRangeKeyGetter(clazz);
            if ( rangeKeyGetter != null ) {
                rangeKeyElement = getRangeKeyElement(safeInvoke(rangeKeyGetter, toDelete), rangeKeyGetter);
            }


            Key objectKey = new Key().withHashKeyElement(hashKeyElement).withRangeKeyElement(rangeKeyElement);


            if ( !requestItems.containsKey(tableName) ) {
                requestItems.put(tableName, new LinkedList<WriteRequest>());
            }


            requestItems.get(tableName).add(
                    new WriteRequest().withDeleteRequest(new DeleteRequest().withKey(objectKey)));
        }


        // Break into chunks of 25 items and make service requests to DynamoDB
        while ( !requestItems.isEmpty() ) {
            HashMap<String, List<WriteRequest>> batch = new HashMap<String, List<WriteRequest>>();
            int i = 0;
            Iterator<Entry<String, List<WriteRequest>>> tableIter = requestItems.entrySet().iterator();
            while ( tableIter.hasNext() && i < 25 ) {
                Entry<String, List<WriteRequest>> tableRequest = tableIter.next();
                batch.put(tableRequest.getKey(), new LinkedList<WriteRequest>());
                Iterator<WriteRequest> writeRequestIter = tableRequest.getValue().iterator();
                while ( writeRequestIter.hasNext() && i++ < 25 ) {
                    WriteRequest writeRequest = writeRequestIter.next();
                    batch.get(tableRequest.getKey()).add(writeRequest);
                    writeRequestIter.remove();
                }


                // If we've processed all the write requests for this table,

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            if ( !requestItems.containsKey(tableName) ) {
                requestItems.put(tableName, new LinkedList<WriteRequest>());
            }


            requestItems.get(tableName).add(
                    new WriteRequest().withPutRequest(new PutRequest().withItem(transformAttributes(clazz, attributeValues))));
        }


        for ( Object toDelete : objectsToDelete ) {
            Class<?> clazz = toDelete.getClass();


            String tableName = getTableName(clazz, config);


            Method hashKeyGetter = reflector.getHashKeyGetter(clazz);
            AttributeValue hashKeyElement = getHashKeyElement(safeInvoke(hashKeyGetter, toDelete), hashKeyGetter);


            AttributeValue rangeKeyElement = null;
            Method rangeKeyGetter = reflector.getRangeKeyGetter(clazz);
            if ( rangeKeyGetter != null ) {
                rangeKeyElement = getRangeKeyElement(safeInvoke(rangeKeyGetter, toDelete), rangeKeyGetter);
            }


            Key objectKey = new Key().withHashKeyElement(hashKeyElement).withRangeKeyElement(rangeKeyElement);


            if ( !requestItems.containsKey(tableName) ) {
                requestItems.put(tableName, new LinkedList<WriteRequest>());
            }


            requestItems.get(tableName).add(
                    new WriteRequest().withDeleteRequest(new DeleteRequest().withKey(objectKey)));
        }


        // Break into chunks of 25 items and make service requests to DynamoDB
        while ( !requestItems.isEmpty() ) {
            HashMap<String, List<WriteRequest>> batch = new HashMap<String, List<WriteRequest>>();
            int i = 0;
            Iterator<Entry<String, List<WriteRequest>>> tableIter = requestItems.entrySet().iterator();
            while ( tableIter.hasNext() && i < 25 ) {
                Entry<String, List<WriteRequest>> tableRequest = tableIter.next();
                batch.put(tableRequest.getKey(), new LinkedList<WriteRequest>());
                Iterator<WriteRequest> writeRequestIter = tableRequest.getValue().iterator();
                while ( writeRequestIter.hasNext() && i++ < 25 ) {
                    WriteRequest writeRequest = writeRequestIter.next();
                    batch.get(tableRequest.getKey()).add(writeRequest);
                    writeRequestIter.remove();
                }


                // If we've processed all the write requests for this table,

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            if ( !requestItems.containsKey(tableName) ) {
                requestItems.put(tableName, new LinkedList<WriteRequest>());
            }


            requestItems.get(tableName).add(
                    new WriteRequest().withPutRequest(new PutRequest().withItem(transformAttributes(clazz, attributeValues))));
        }


        for ( Object toDelete : objectsToDelete ) {
            Class<?> clazz = toDelete.getClass();


            String tableName = getTableName(clazz, config);


            Method hashKeyGetter = reflector.getHashKeyGetter(clazz);
            AttributeValue hashKeyElement = getHashKeyElement(safeInvoke(hashKeyGetter, toDelete), hashKeyGetter);


            AttributeValue rangeKeyElement = null;
            Method rangeKeyGetter = reflector.getRangeKeyGetter(clazz);
            if ( rangeKeyGetter != null ) {
                rangeKeyElement = getRangeKeyElement(safeInvoke(rangeKeyGetter, toDelete), rangeKeyGetter);
            }


            Key objectKey = new Key().withHashKeyElement(hashKeyElement).withRangeKeyElement(rangeKeyElement);


            if ( !requestItems.containsKey(tableName) ) {
                requestItems.put(tableName, new LinkedList<WriteRequest>());
            }


            requestItems.get(tableName).add(
                    new WriteRequest().withDeleteRequest(new DeleteRequest().withKey(objectKey)));
        }


        // Break into chunks of 25 items and make service requests to DynamoDB
        while ( !requestItems.isEmpty() ) {
            HashMap<String, List<WriteRequest>> batch = new HashMap<String, List<WriteRequest>>();
            int i = 0;
            Iterator<Entry<String, List<WriteRequest>>> tableIter = requestItems.entrySet().iterator();
            while ( tableIter.hasNext() && i < 25 ) {
                Entry<String, List<WriteRequest>> tableRequest = tableIter.next();
                batch.put(tableRequest.getKey(), new LinkedList<WriteRequest>());
                Iterator<WriteRequest> writeRequestIter = tableRequest.getValue().iterator();
                while ( writeRequestIter.hasNext() && i++ < 25 ) {
                    WriteRequest writeRequest = writeRequestIter.next();
                    batch.get(tableRequest.getKey()).add(writeRequest);
                    writeRequestIter.remove();
                }


                // If we've processed all the write requests for this table,

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