DemoClient.java

/*
 * #%L
 * FlatPack Demonstration Client
 * %%
 * Copyright (C) 2012 Perka Inc.
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */
package com.getperka.flatpack.demo.client;

import java.math.BigDecimal;
import java.net.URI;
import java.util.Collections;
import java.util.Map;
import java.util.Random;

import com.getperka.flatpack.Configuration;
import com.getperka.flatpack.FlatPack;
import com.getperka.flatpack.FlatPackEntity;

public class DemoClient {
  public static void main(String[] args) throws Exception {
    System.exit(new DemoClient().exec() ? 0 : 1);
  }

  public boolean exec() throws Exception {
    /*
     * Configuration of a client-side FlatPack stack is very similar to the server-side
     * configuration.
     */
    Configuration configuration = new Configuration()
        /*
         * The ClientTypeSource is generated by the code-gen tool and contains all of the types
         * generated from the ApiDescription.
         */
        .addTypeSource(ClientTypeSource.get())
        /*
         * Enabling this flag is usually the right choice for a client app, where old clients
         * talking to new servers should ignore unrecognized types in the payload (since they won't
         * have any property definitions of that type).
         */
        .withIgnoreUnresolvableTypes(true)
        // Turning on PrettyPrint and Verbose for demonstration purposes
        .withPrettyPrint(true)
        .withVerbose(true);

    // This ClientApi type is generated
    ClientApi api = new ClientApi(FlatPack.create(configuration));
    api.setServerBase(new URI("http://localhost:8080"));

    // A simple query for all Products. This is another generated type.
    for (Product product : api.productsGet().execute().getValue()) {
      System.out.println(product.getName() + " " + product.getPrice() + " " + product.getNotes());
    }

    // Creating a new product is fairly straightforward
    Product p = new Product();
    p.setName("DemoClient");
    p.setNotes("Created by " + System.getProperty("user.name"));
    p.setPrice(BigDecimal.valueOf(new Random().nextInt(100)));

    FlatPackEntity<Void> returnValue = api.productsPut(Collections.singletonList(p)).execute();
    // Server implementations may make ConstraintViolaions available via the extra errors map
    if (!returnValue.getExtraErrors().isEmpty()) {
      for (Map.Entry<String, String> entry : returnValue.getExtraErrors().entrySet()) {
        System.err.println(entry.getKey() + " : " + entry.getValue());
      }
    }

    return true;
  }
}