com.cognifide.qa.bb.aem.AemInstanceDetails.java Source code

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Here is the source code for com.cognifide.qa.bb.aem.AemInstanceDetails.java

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/*-
 * #%L
 * Bobcat
 * %%
 * Copyright (C) 2016 Cognifide Ltd.
 * %%
 * 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.
 * #L%
 */
package com.cognifide.qa.bb.aem;

import java.io.IOException;

import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.util.EntityUtils;
import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.cognifide.qa.bb.constants.AemConfigKeys;
import com.google.gson.Gson;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import com.google.inject.name.Named;

/**
 * This class provides information about AEM instance version described in property files.
 */
@Singleton
public class AemInstanceDetails {

    private static final Logger LOG = LoggerFactory.getLogger(AemInstanceDetails.class);

    @Inject
    @Named(AemConfigKeys.AUTHOR_IP)
    private String authorIp;

    @Inject
    private CloseableHttpClient httpClient;

    private DefaultArtifactVersion aemVersion;

    /**
     * @return Version of author instance.
     */
    public synchronized DefaultArtifactVersion getAemVersion() {
        if (aemVersion == null) {
            String versionInfo = sendInfoRequests();
            aemVersion = parseVersionInfo(versionInfo);
        }
        return aemVersion;
    }

    private String sendInfoRequests() {
        HttpGet infoGet = new HttpGet(authorIp + "/libs/cq/core/productinfo.json");
        String resultJson = "";
        try (CloseableHttpResponse infoResponse = httpClient.execute(infoGet)) {
            resultJson = EntityUtils.toString(infoResponse.getEntity());
        } catch (IOException e) {
            LOG.error("Can't get aem version", e);
        } finally {
            infoGet.reset();
        }

        return resultJson;
    }

    private DefaultArtifactVersion parseVersionInfo(String versionInfo) {
        Gson gson = new Gson();
        JsonElement element = gson.fromJson(versionInfo, JsonElement.class);
        JsonObject jsonObj = element.getAsJsonObject();
        aemVersion = new DefaultArtifactVersion(jsonObj.get("version").getAsString());

        return aemVersion;
    }
}