Nonexistent versus Unmodified Objects with the Riak Java Client RawClient

app.java

package test;
import java.io.IOException;
import java.util.Date;

import com.basho.riak.client.IRiakObject;
import com.basho.riak.client.RiakException;
import com.basho.riak.client.builders.RiakObjectBuilder;
import com.basho.riak.client.http.RiakClient;
import com.basho.riak.client.raw.FetchMeta;
import com.basho.riak.client.raw.RawClient;
import com.basho.riak.client.raw.RiakResponse;
import com.basho.riak.client.raw.StoreMeta;
import com.basho.riak.client.raw.http.HTTPClientAdapter;

public class App 
{

	public static void main(String[] args) throws RiakException, IOException {
		RiakClient httpClient = new RiakClient("http://127.0.0.1:8098/riak");
		RawClient rc = new HTTPClientAdapter(httpClient);

		// Build a sample object
		IRiakObject cat = RiakObjectBuilder.newBuilder("Pets", "Cat").
			withValue("Meow").build();	
			
		StoreMeta returnBodyStoreMeta =  new StoreMeta.Builder().returnBody(true).build();
		RiakResponse storedCatResponse = rc.store(cat, returnBodyStoreMeta);
		Date lastModified = storedCatResponse.getRiakObjects()[0].getLastModified();
		
		// Fetch the object to see if updated (Should not fetch anything)
		FetchMeta myFetchMeta = new FetchMeta.Builder().
			modifiedSince(lastModified).build();
		RiakResponse fetchedCat = rc.fetch("Pets",  "Cat", myFetchMeta);

		// Try to fetch a nonexistent object
		RiakResponse fetchedLemur= rc.fetch("Pets",  "Lemur", myFetchMeta);
		
		System.out.printf("fetchedCat.getRiakObjects().length:%d unmodified:%s%n", 
				fetchedCat.getRiakObjects().length, 
				fetchedCat.isUnmodified() );  // Unmodified object
		
		System.out.printf("fetchedLemur.getRiakObjects().length:%d unmodified:%s%n", 
				fetchedLemur.getRiakObjects().length, 
				fetchedLemur.isUnmodified() ); // Nonexistent object
		

	}
}

output.txt

fetchedCat.getRiakObjects().length:0 unmodified:true
fetchedLemur.getRiakObjects().length:0 unmodified:false

+1