net.wouterdanes.docker.remoteapi.BaseService Maven / Gradle / Ivy

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package net.wouterdanes.docker.remoteapi;

import java.io.IOException;

import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.WebTarget;

import org.codehaus.jackson.map.DeserializationConfig;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.map.annotate.JsonSerialize;

/**
 * This class is responsible for holding the shared functionality of all Docker remoteapi services.
 */
public abstract class BaseService {

    public static final String TARGET_DOCKER_API_VERSION = "v1.10";
    private final ObjectMapper objectMapper;
    private final WebTarget serviceEndPoint;

    public BaseService(String dockerApiRoot, String endPointPath) {
        objectMapper = new ObjectMapper();
        // Only send properties that are actually set, default values are often wrong
        objectMapper.setSerializationInclusion(JsonSerialize.Inclusion.NON_NULL);
        // If the API changes, we might get new properties that we do not know
        DeserializationConfig deserializationConfig = objectMapper.getDeserializationConfig()
                .without(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES);
        objectMapper.setDeserializationConfig(deserializationConfig);
        serviceEndPoint = ClientBuilder.newClient()
                .target(dockerApiRoot)
                .path(TARGET_DOCKER_API_VERSION)
                .path(endPointPath);
    }

    protected WebTarget getServiceEndPoint() {
        return serviceEndPoint;
    }

    protected String toJson(Object obj) {
        try {
            return objectMapper.writeValueAsString(obj);
        } catch (IOException e) {
            throw new IllegalStateException("Unable to Jsonify", e);
        }
    }

    protected  T toObject(String json, Class clazz) {
        try {
            return objectMapper.readValue(json, clazz);
        } catch (IOException e) {
            throw new IllegalStateException("Cannot convert Json", e);
        }
    }
}