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Generic Plane and Agent to be used to wire the different Patches

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// Copyright 2015-2024 Nstream, inc.
//
// Licensed under the Redis Source Available License 2.0 (RSALv2) Agreement;
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     https://redis.com/legal/rsalv2-agreement/
//
// 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 nstream.adapter.runtime;

import java.io.IOException;
import nstream.adapter.common.LabeledLog;
import nstream.adapter.common.provision.ProvisionLoader;
import swim.api.plane.AbstractPlane;
import swim.kernel.Kernel;
import swim.kernel.KernelLoader;
import swim.server.ServerLoader;
import swim.structure.Value;
import swim.util.Log;

public class AppPlane extends AbstractPlane {

  private static final Log DEFAULT_LOG = LabeledLog.forUniform("AppPlane#main", System.out::println);

  public AppPlane() {
  }

  private static Value kernelConfig() {
    final ClassLoader classLoader = AppPlane.class.getClassLoader();
    try {
      Value kernelConfig = KernelLoader.loadConfig(classLoader);
      if (kernelConfig == null) {
        kernelConfig = KernelLoader.loadConfigResource(classLoader, "server.recon");
      }
      if (kernelConfig == null) {
        kernelConfig = Value.absent();
      }
      return kernelConfig;
    } catch (IOException e) {
      throw new RuntimeException("Failed to load kernel config", e);
    }
  }

  public static void main(String[] args) {
    // Load resources that may be required by the Swim plane, as configured by
    // the server configuration file.
    final int provisionLoadErrors = ProvisionLoader.loadProvisions(DEFAULT_LOG, kernelConfig());
    if (provisionLoadErrors > 0) {
      DEFAULT_LOG.error(provisionLoadErrors + " Provisions did not load correctly; will not initialize Swim server");
      System.exit(-1);
    }
    ProvisionLoader.logProvisionNames(DEFAULT_LOG);

    // Load the SwimOS kernel, loading its configuration from the
    // `server.recon` Java resource.
    final Kernel kernel = ServerLoader.loadServer();

    // Boot the SwimOS kernel.
    kernel.start();
    System.out.println("Running AppPlane ...");

    // Park the main thread while the application concurrently runs.
    kernel.run();
  }

}