Example usage for org.apache.solr.cloud ZkController configFileExists

Introduction

In this page you can find the example usage for org.apache.solr.cloud ZkController configFileExists.

Prototype

public boolean configFileExists(String collection, String fileName)
        throws KeeperException, InterruptedException 

Source Link

Document

Returns true if config file exists

Usage

From source file:com.billiger.solr.handler.component.QLTBComponent.java

License:Apache License

/**
 * Inform component of core reload.//from w  w w  .  j  av  a  2 s .c  om
 *
 * This will both set the analyzer according to the configured
 * queryFieldType, and load the QLTB data. Data source can be (in this
 * order) ZooKeeper, the conf/ directory or the data/ directory.
 */
@Override
public final void inform(final SolrCore core) {
    // load analyzer
    String queryFieldType = initArgs.get(FIELD_TYPE);
    if (queryFieldType != null) {
        FieldType ft = core.getLatestSchema().getFieldTypes().get(queryFieldType);
        if (ft == null) {
            throw new SolrException(SolrException.ErrorCode.SERVER_ERROR,
                    "unknown FieldType \"" + queryFieldType + "\" used in QLTBComponent");
        }
        analyzer = ft.getQueryAnalyzer();
    } else {
        analyzer = null;
    }
    synchronized (qltbCache) {
        qltbCache.clear();
        try {
            // retrieve QLTB data filename
            String qltbFile = initArgs.get(QLTB_FILE);
            if (qltbFile == null) {
                throw new SolrException(SolrException.ErrorCode.SERVER_ERROR,
                        "QLTBComponent must specify argument: \"" + QLTB_FILE + "\" - path to QLTB data");
            }
            boolean exists = false;
            // check ZooKeeper
            ZkController zkController = core.getCoreDescriptor().getCoreContainer().getZkController();
            if (zkController != null) {
                exists = zkController.configFileExists(zkController.readConfigName(
                        core.getCoreDescriptor().getCloudDescriptor().getCollectionName()), qltbFile);
            } else {
                // no ZooKeeper, check conf/ and data/ directories
                File fConf = new File(core.getResourceLoader().getConfigDir(), qltbFile);
                File fData = new File(core.getDataDir(), qltbFile);
                if (fConf.exists() == fData.exists()) {
                    // both or neither exist
                    throw new SolrException(SolrException.ErrorCode.SERVER_ERROR,
                            "QLTBComponent missing config file: \"" + qltbFile + "\": either "
                                    + fConf.getAbsolutePath() + " or " + fData.getAbsolutePath()
                                    + " must exist, but not both");
                }
                if (fConf.exists()) {
                    // conf/ found, load it
                    exists = true;
                    log.info("QLTB source conf/: " + fConf.getAbsolutePath());
                    Config cfg = new Config(core.getResourceLoader(), qltbFile);
                    qltbCache.put(null, loadQLTBMap(cfg, core));
                }
            }
            if (!exists) {
                // Neither ZooKeeper nor conf/, so must be in data/
                // We need an IndexReader and the normal
                RefCounted<SolrIndexSearcher> searcher = null;
                try {
                    searcher = core.getNewestSearcher(false);
                    IndexReader reader = searcher.get().getIndexReader();
                    getQLTBMap(reader, core);
                } finally {
                    if (searcher != null) {
                        searcher.decref();
                    }
                }
            }
        } catch (Exception ex) {
            throw new SolrException(SolrException.ErrorCode.SERVER_ERROR, "Error initializing QltbComponent.",
                    ex);
        }
    }
}

---