As_operations_map remove_by_value_range for nested maps

[pgupta]

If you are willing to change your data model slightly, then you can achieve what you want. Please see this earlier post also for a different problem solved with similar strategy:

Searching for the index of specific AAID

Hi Folks, We are trying to fetch the index of data from the list without using the Full Scan on the record we will be having the AAID and we have to fetch the index of only that userId currently it is giving the index in list format i.e. [0,1,2,...] need to get the index of that specific AAID which in our case is 1 Note: Bucket Id is calculated on the basis of first 9 character of the AAID 129709 (BucketId): { LIST( '70806216-b083-3e19-81d6-4179d891e8f5' (AAID1):{ MAP( 1234 (FlightAd…

You can use the same technique to store your data in a sorted list. Then you can delete by value range. See code example in Java client below:

My test record:

Key myKey = new Key("test", "testset", "CampaignId");
String binName = "myListBin1";
ListPolicy lPolicy = new ListPolicy(ListOrder.ORDERED, ListWriteFlags.DEFAULT);

Note: ListPolicy is ORDERED

Initial Model was a Map of Key:Value pairs

Map: {c1:{"ttl":700, "value":"abc"}, c2:{"ttl":1800, ...} , c3:{"ttl":200, .. }, ...}

Since we cannot do WILDCARD search on Map values elements, we can use a Sorted List of Lists.

Modify data model as: [ [ttl1, c1:{ ...}], [ttl2, c2:{ ... }], [ttl3, c3:{....} ] ]

In this model, let us insert some data in this record:

//Add record data
List<Value> list_cx = new ArrayList<Value>();
list_cx.add(Value.get(1800));
HashMap <String, Value> map_cx = new HashMap <String, Value>();
map_cx.put("ttl", Value.get(1800));
map_cx.put("value", Value.get("bcd1800"));
list_cx.add(Value.get(map_cx));
client.operate(null, myKey, ListOperation.append(lPolicy, binName, Value.get(list_cx)));
list_cx.clear();

list_cx.add(Value.get(700));
HashMap <String, Value> map_cx = new HashMap <String, Value>();
map_cx.put("ttl", Value.get(700));
map_cx.put("value", Value.get("abc700"));
list_cx.add(Value.get(map_cx));
client.operate(null, myKey, ListOperation.append(lPolicy, binName, Value.get(list_cx)));
list_cx.clear();

list_cx.add(Value.get(200));
HashMap <String, Value> map_cx = new HashMap <String, Value>();
map_cx.put("ttl", Value.get(200));
map_cx.put("value", Value.get("cde200"));
list_cx.add(Value.get(map_cx));
client.operate(null, myKey, ListOperation.append(lPolicy, binName, Value.get(list_cx)));
list_cx.clear();

list_cx.add(Value.get(1200));
HashMap <String, Value> map_cx = new HashMap <String, Value>();
map_cx.put("ttl", Value.get(1200));
map_cx.put("value", Value.get("efg1200"));
list_cx.add(Value.get(map_cx));
client.operate(null, myKey, ListOperation.append(lPolicy, binName, Value.get(list_cx)));
list_cx.clear();


System.out.println("My List after data insert: "+ client.get(null, myKey));

Output:

My List after data insert: (gen:4),(exp:0),(bins:(myListBin1:[[200, {ttl=200, value=cde200}], [700, {ttl=700, value=abc700}], [1200, {ttl=1200, value=efg1200}], [1800, {ttl=1800, value=bcd1800}]]))

Now, we can read items by ttl value range, likewise, delete items by ttl value range.

Getting items by ttl value range:

List<Value> startItem = new ArrayList<Value>();
startItem.add(Value.get(100));
startItem.add(Value.get(Value.WILDCARD));

List<Value> endItem = new ArrayList<Value>();
endItem.add(Value.get(1000));
endItem.add(Value.get(Value.WILDCARD));

System.out.println(client.operate(null, myKey, 
            ListOperation.getByValueRange("myListBin1", 
            Value.ListValue.get(startItem), Value.ListValue.get(endItem), 
            ListReturnType.VALUE)));

Output:

(gen:4),(exp:0),(bins:(myListBin1:[[200, {ttl=200, value=cde200}], [700, {ttl=700, value=abc700}]]))

Check full record:

System.out.println("My record: "+ client.get(null, myKey));

Output:

My record: (gen:4),(exp:0),(bins:(myListBin1:[[200, {ttl=200, value=cde200}], [700, {ttl=700, value=abc700}], [1200, {ttl=1200, value=efg1200}], [1800, {ttl=1800, value=bcd1800}]]))

Delete by ttl range:

List<Value> startItem = new ArrayList<Value>();
startItem.add(Value.get(600));
startItem.add(Value.get(Value.WILDCARD));

List<Value> endItem = new ArrayList<Value>();
endItem.add(Value.get(1500));
endItem.add(Value.get(Value.WILDCARD));

client.operate(null, myKey, 
            ListOperation.removeByValueRange("myListBin1", 
            Value.ListValue.get(startItem), Value.ListValue.get(endItem), 
            ListReturnType.VALUE));

System.out.println("My record after ttl range delete: "+ client.get(null, myKey));

Output:

My record after ttl range delete: (gen:5),(exp:0),(bins:(myListBin1:[[200, {ttl=200, value=cde200}], [1800, {ttl=1800, value=bcd1800}]]))