org.lendingclub.mercator.docker.DockerEndpointMetadataImpl.java Source code

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Here is the source code for org.lendingclub.mercator.docker.DockerEndpointMetadataImpl.java

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/**
 * Copyright 2017 Lending Club, 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.
 */
package org.lendingclub.mercator.docker;

import java.util.Optional;

import javax.ws.rs.core.Response;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.base.Strings;

class DockerEndpointMetadataImpl implements DockerEndpointMetadata {
    static ObjectMapper mapper = new ObjectMapper();
    static Logger logger = LoggerFactory.getLogger(DockerClientSupplier.class);
    DockerClientSupplier supplier;

    public DockerEndpointMetadataImpl(DockerClientSupplier supplier) {
        this.supplier = supplier;
    }

    public Optional<String> getSwarmId() {
        JsonNode n = supplier.getWebTarget().path("/info").request().get(JsonNode.class);

        return Optional.ofNullable(Strings.emptyToNull(n.path("Swarm").path("Cluster").path("ID").asText()));
    }

    @Override
    public EndpointType getEndpointType() {

        JsonNode n = supplier.getWebTarget().path("/info").request().get(JsonNode.class);

        if (Strings.isNullOrEmpty(n.path("Swarm").path("NodeID").asText(null))) {
            return EndpointType.ENGINE;
        }

        if (n.path("ServerVersion").asText().contains("ucp")) {

            return EndpointType.UCP;
        }

        return EndpointType.SWARM;

    }
}