/**
 * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
 *
 * 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.
 */
package io.gravitee.gateway.services.sync.handler;

import io.gravitee.common.http.HttpHeaders;
import io.gravitee.common.http.HttpStatusCode;
import io.gravitee.common.http.MediaType;
import io.gravitee.gateway.services.sync.SyncManager;
import io.vertx.core.Handler;
import io.vertx.core.http.HttpServerResponse;
import io.vertx.core.json.JsonObject;
import io.vertx.ext.web.RoutingContext;
import org.springframework.beans.factory.annotation.Autowired;

/**
 * @author David BRASSELY (david.brassely at graviteesource.com)
 * @author GraviteeSource Team
 */
public class SyncHandler implements Handler<RoutingContext> {

    @Autowired
    private SyncManager syncManager;

    @Override
    public void handle(RoutingContext ctx) {
        HttpServerResponse response = ctx.response();
        JsonObject object = new JsonObject()
                .put("synced", syncManager.isSynced())
                .put("counter", syncManager.getCounter())
                .put("lastRefreshAt", syncManager.getLastRefreshAt())
                .put("errors", syncManager.getErrors())
                .put("totalErrors", syncManager.getTotalErrors())
                .put("lastErrorMessage", syncManager.getLastErrorMessage());

        response.putHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON);
        response.setChunked(true);
        response.write(object.encodePrettily());

        response.setStatusCode(syncManager.isSynced() ? HttpStatusCode.OK_200 : HttpStatusCode.SERVICE_UNAVAILABLE_503);
        response.end();
    }
}

/**
 * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
 *
 * 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.
 */
package io.gravitee.gateway.services.sync.handler;

import io.gravitee.common.http.HttpHeaders;
import io.gravitee.common.http.HttpStatusCode;
import io.gravitee.common.http.MediaType;
import io.gravitee.gateway.services.sync.SyncManager;
import io.vertx.core.Handler;
import io.vertx.core.http.HttpServerResponse;
import io.vertx.core.json.JsonObject;
import io.vertx.ext.web.RoutingContext;
import org.springframework.beans.factory.annotation.Autowired;

/**
 * @author David BRASSELY (david.brassely at graviteesource.com)
 * @author GraviteeSource Team
 */
public class SyncHandler implements Handler<RoutingContext> {

    @Autowired
    private SyncManager syncManager;

    @Override
    public void handle(RoutingContext ctx) {
        HttpServerResponse response = ctx.response();
        JsonObject object = new JsonObject()
                .put("synced", syncManager.isSynced())
                .put("counter", syncManager.getCounter())
                .put("lastRefreshAt", syncManager.getLastRefreshAt())
                .put("errors", syncManager.getErrors())
                .put("totalErrors", syncManager.getTotalErrors())
                .put("lastErrorMessage", syncManager.getLastErrorMessage());

        response.setStatusCode(syncManager.isSynced() ? HttpStatusCode.OK_200 : HttpStatusCode.SERVICE_UNAVAILABLE_503);
        response.putHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON);
        response.setChunked(true);

        response.end(object.encodePrettily());
    }
}

Write HEAD before response's payload