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package eu.dnetlib.functionality.index.utils;
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import com.google.common.collect.Maps;
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import com.google.gson.JsonElement;
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import com.google.gson.JsonObject;
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import com.google.gson.JsonParser;
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import eu.dnetlib.data.provision.index.rmi.IndexServiceException;
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import eu.dnetlib.functionality.index.model.Any.ValueType;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.apache.http.HttpResponse;
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import org.apache.http.client.HttpClient;
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import org.apache.http.client.methods.HttpGet;
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import org.apache.solr.client.solrj.SolrClient;
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import org.apache.solr.client.solrj.SolrServerException;
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import org.apache.solr.client.solrj.impl.CloudSolrClient;
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import org.apache.solr.client.solrj.request.LukeRequest;
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import org.apache.solr.client.solrj.response.LukeResponse;
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import org.apache.solr.client.solrj.response.LukeResponse.FieldInfo;
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import org.apache.solr.client.solrj.response.SolrPingResponse;
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import org.apache.solr.common.cloud.SolrZkClient;
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import org.apache.zookeeper.WatchedEvent;
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import org.apache.zookeeper.Watcher;
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import org.apache.zookeeper.data.Stat;
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import org.springframework.beans.factory.annotation.Required;
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import java.io.IOException;
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import java.util.Map;
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public class RemoteSolrAdministrator {
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/**
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* The log.
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*/
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private static final Log log = LogFactory.getLog(RemoteSolrAdministrator.class);
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/** The create url request. */
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private static String createURLRequest = "http://%s:%s/solr/admin/collections?action=CREATE&name=%s&numShards=%s&replicationFactor=%s&maxShardsPerNode=%s&collection.configName=%s";
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/** The create url request. */
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private static String reloadURLRequest = "http://%s:%s/solr/admin/collections?action=RELOAD&name=%s";
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/** The http client. */
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private HttpClient httpClient;
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protected Map<String, Map<String, ValueType>> cachedSchema;
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public RemoteSolrAdministrator() {
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this.cachedSchema = Maps.newHashMap();
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}
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public boolean createSolrIndex(final String host,
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final String port,
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final String collectionName,
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final String numShard,
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final String replicationFactor,
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final String maxShardsPerNode,
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final String collectionConfigName) throws IndexServiceException {
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final String uri = generateCreateIndexRequest(host, port, collectionName, numShard, replicationFactor, maxShardsPerNode, collectionConfigName);
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log.info(uri);
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HttpGet request = new HttpGet(uri);
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HttpResponse response;
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try {
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response = getHttpClient().execute(request);
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} catch (Exception e) {
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throw new IndexServiceException("Unable to send request to solr server", e);
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} finally {
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request.releaseConnection();
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}
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if (response.getStatusLine().getStatusCode() != 200)
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throw new IndexServiceException("Error on creating index the error code from solr is" + response.toString());
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return false;
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}
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public boolean indexCollectionExists(final String indexCollectionId, final CloudSolrClient client) {
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Watcher watcher = new Watcher() {
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@Override
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public void process(final WatchedEvent arg0) {}
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};
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try {
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// server.connect();
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SolrZkClient zkClient = client.getZkStateReader().getZkClient();
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if (!zkClient.isConnected()) {
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client.close();
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client.connect();
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}
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byte[] data = zkClient.getData("/clusterstate.json", watcher, new Stat(), true);
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if (data == null) return false;
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String jsonLine = new String(data);
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JsonElement jelement = new JsonParser().parse(jsonLine);
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JsonObject jobject = jelement.getAsJsonObject();
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if (jobject.has(indexCollectionId)) {
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client.setDefaultCollection(indexCollectionId);
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client.connect();
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SolrPingResponse status = client.ping();
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return (Integer) status.getResponseHeader().get("status") == 0;
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} else return false;
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} catch (Exception e) {
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log.error(e);
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return false;
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}
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}
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private ValueType resolveSolrTypeClassName(final String solrTypeName) {
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if (solrTypeName.contains("LongField")) return ValueType.LONG;
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else if (solrTypeName.contains("IntField")) return ValueType.LONG;
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else if (solrTypeName.contains("short")) return ValueType.LONG;
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else if (solrTypeName.contains("float")) return ValueType.DOUBLE;
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else if (solrTypeName.contains("double")) return ValueType.DOUBLE;
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else if (solrTypeName.contains("date")) return ValueType.DATETIME;
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else return ValueType.STRING;
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}
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public Map<String, ValueType> getFieldNamesAndTypes(final String coreName, final SolrClient client) throws IndexServiceException {
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try {
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if (cachedSchema.get(coreName) == null) {
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synchronized (cachedSchema) {
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Map<String, ValueType> schema = readFieldNamesAndTypes(coreName, client);
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log.info("setting cache for schema of collection: " + coreName);
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cachedSchema.put(coreName, schema);
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}
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}
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return cachedSchema.get(coreName);
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} catch (Exception e) {
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throw new IndexServiceException("Unable to get Schema for " + coreName + " exception", e);
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}
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}
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private Map<String, ValueType> readFieldNamesAndTypes(final String coreName, final SolrClient client) throws SolrServerException, IOException {
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final LukeRequest request = new LukeRequest();
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request.setShowSchema(true);
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request.setNumTerms(0);
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final LukeResponse response = request.process(client);
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final Map<String, FieldInfo> fieldInfos = response.getFieldInfo();
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final Map<String, LukeResponse.FieldTypeInfo> fieldTypeInfos = response.getFieldTypeInfo();
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final Map<String, ValueType> result = Maps.newHashMap();
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for (FieldInfo fieldInfo : fieldInfos.values()) {
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LukeResponse.FieldTypeInfo fieldTypeInfo = fieldTypeInfos.get(fieldInfo.getType());
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final String fieldName = fieldTypeInfo.getName().toLowerCase();
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final ValueType fieldType = resolveSolrTypeClassName(fieldName);
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result.put(fieldInfo.getName(), fieldType);
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}
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return result;
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}
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private String generateCreateIndexRequest(final String host,
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final String port,
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final String collectionName,
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final String numShard,
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final String replicationFactor,
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final String collectionConfigName,
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final String maxShardsPerNode) {
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return String.format(createURLRequest, host, port, collectionName, numShard, replicationFactor, maxShardsPerNode, collectionConfigName);
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}
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private String generateUpdateIndexRequest(final String host, final String port, final String collectionName) {
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return String.format(reloadURLRequest, host, port, collectionName);
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}
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/**
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* @return the httpClient
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*/
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public HttpClient getHttpClient() {
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return httpClient;
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}
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/**
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* @param httpClient
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* the httpClient to set
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*/
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@Required
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public void setHttpClient(final HttpClient httpClient) {
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log.info("setting http client " + httpClient.getClass());
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this.httpClient = httpClient;
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}
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public void reloadCollection(final String host, final String port, final String collectionName) throws IndexServiceException {
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log.info("creating the request of reload index " + generateUpdateIndexRequest(host, port, collectionName));
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HttpGet request = new HttpGet(generateUpdateIndexRequest(host, port, collectionName));
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HttpResponse response;
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try {
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response = httpClient.execute(request);
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} catch (Exception e) {
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throw new IndexServiceException("Unable to send request to solr server", e);
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} finally {
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request.releaseConnection();
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}
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if (response.getStatusLine().getStatusCode() != 200)
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throw new IndexServiceException("Error on reloading index the error code from solr is" + response.toString());
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}
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}
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