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Microservice query language for Java
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package restql.core.examples;

import restql.core.RestQL;
import restql.core.config.ClassConfigRepository;
import restql.core.hooks.AfterQueryHook;
import restql.core.hooks.AfterRequestHook;
import restql.core.hooks.QueryHook;
import restql.core.hooks.RequestHook;
import restql.core.query.QueryOptions;

import java.util.Map;


public class AsyncQueryWithHooks {

	public static class BeforeRequestHook extends RequestHook {

		public void execute() {
			System.out.println("[BEFORE REQUEST]");
			for (Map.Entry e : this.getData().entrySet()) {
				System.out.println(e.getKey() + " - " + e.getValue());
			}
		}
	}

	public static class SimpleAfterRequestHook extends AfterRequestHook {

		public void execute() {
			System.out.println("[AFTER REQUEST]");
			System.out.println(this.getUrl() + " => " + this.getTimeout() + " CODE: " + this.getResponseStatusCode()
					+ " (" + this.getReponseTime() + ")");

			if (this.isError())
				System.out.println("Error: " + this.getData().get("errordetail"));
			else {
				for (Map.Entry e : this.getHeaders().entrySet()) {
					System.out.println(e.getKey() + " = " + e.getValue());
				}
			}

		}
	}

	public static class BeforeQueryHook extends QueryHook {

		public void execute() {
			System.out.println("[BEFORE QUERY] " + this.getQuery());
		}
	}

	public static class SimpleAfterQueryHook extends AfterQueryHook {

		public void execute() {
			System.out.println("[AFTER QUERY] " + this.getQuery());
			System.out.println(this.getResult().toString());
		}
	}

	public static void main(String[] args) throws Exception {

		ClassConfigRepository config = new ClassConfigRepository();
		config.put("cards", "http://api.magicthegathering.io/v1/cards/:id");

		RestQL restQL = new RestQL(config);
		String query = "from cards as card with id = ?";
		QueryOptions opts = new QueryOptions();

		opts.setBeforeQueryHook(BeforeQueryHook.class);
		opts.setAfterQuerytHook(SimpleAfterQueryHook.class);
		opts.setBeforeRequestHook(BeforeRequestHook.class);
		opts.setAfterRequestHook(SimpleAfterRequestHook.class);

		restQL.executeQueryAsync(query, opts, System.out::println, "693f4d338e4f041ccf4dd158ccde0b14dfc51ee0");
		Thread.sleep(5000);
	}
}