Developpement de plugins DataStore

Vue d’ensemble

En developpant un plugin DataStore, vous pouvez ajouter a Fess la capacite de recuperer du contenu depuis de nouvelles sources de donnees.

Structure de base

Un plugin DataStore herite de AbstractDataStore.

Implementation minimale

package org.codelibs.fess.ds.example;

import java.util.Map;

import org.codelibs.fess.ds.AbstractDataStore;
import org.codelibs.fess.ds.callback.IndexUpdateCallback;
import org.codelibs.fess.opensearch.config.exentity.DataConfig;

public class ExampleDataStore extends AbstractDataStore {

    @Override
    public String getName() {
        return "Example";
    }

    @Override
    protected void storeData(
            final DataConfig dataConfig,
            final IndexUpdateCallback callback,
            final Map<String, String> paramMap,
            final Map<String, String> scriptMap,
            final Map<String, Object> defaultDataMap) {

        // Implementer la recuperation et le traitement des donnees ici
    }
}

AbstractDataStore

Methodes principales

Methode Description
getName() Retourne le nom du DataStore (obligatoire)
storeData() Effectue la recuperation et l’enregistrement dans l’index (obligatoire)
register() Enregistre le plugin

Parametres

Parametres passes a la methode storeData():

  • dataConfig: Configuration du DataStore

  • callback: Callback pour la mise a jour de l’index

  • paramMap: Parametres configures dans l’interface d’administration

  • scriptMap: Configuration des scripts

  • defaultDataMap: Map de donnees par defaut

Exemple d’implementation

DataStore simple

@Override
protected void storeData(
        final DataConfig dataConfig,
        final IndexUpdateCallback callback,
        final Map<String, String> paramMap,
        final Map<String, String> scriptMap,
        final Map<String, Object> defaultDataMap) {

    // Recuperation des parametres
    final String apiUrl = paramMap.get("api.url");
    final String apiKey = paramMap.get("api.key");

    try {
        // Recuperation des donnees
        List<Document> documents = fetchDocuments(apiUrl, apiKey);

        // Traitement de chaque document
        for (Document doc : documents) {
            final Map<String, Object> dataMap = new HashMap<>(defaultDataMap);

            // Mapping des donnees
            dataMap.put("url", doc.getUrl());
            dataMap.put("title", doc.getTitle());
            dataMap.put("content", doc.getContent());
            dataMap.put("lastModified", doc.getUpdatedAt());

            // Execution du script (mapping)
            final Map<String, Object> resultMap = new HashMap<>();
            for (Map.Entry<String, String> entry : scriptMap.entrySet()) {
                Object value = convertValue(entry.getValue(), dataMap);
                if (value != null) {
                    resultMap.put(entry.getKey(), value);
                }
            }

            // Enregistrement dans l'index
            callback.store(paramMap, resultMap);
        }
    } catch (Exception e) {
        logger.error("Failed to crawl data", e);
    }
}

Gestion de la pagination

@Override
protected void storeData(...) {
    int page = 0;
    int pageSize = 100;

    while (true) {
        List<Document> documents = fetchDocuments(apiUrl, apiKey, page, pageSize);

        if (documents.isEmpty()) {
            break;
        }

        for (Document doc : documents) {
            processDocument(doc, callback, paramMap, scriptMap, defaultDataMap);
        }

        page++;
    }
}

Implementation de l’authentification

OAuth 2.0

protected String getAccessToken(String clientId, String clientSecret, String refreshToken) {
    // Rafraichissement du token
    OkHttpClient client = new OkHttpClient();

    RequestBody body = new FormBody.Builder()
        .add("grant_type", "refresh_token")
        .add("client_id", clientId)
        .add("client_secret", clientSecret)
        .add("refresh_token", refreshToken)
        .build();

    Request request = new Request.Builder()
        .url("https://oauth.example.com/token")
        .post(body)
        .build();

    try (Response response = client.newCall(request).execute()) {
        JsonNode json = objectMapper.readTree(response.body().string());
        return json.get("access_token").asText();
    }
}

Authentification par cle API

protected Response callApi(String url, String apiKey) {
    Request request = new Request.Builder()
        .url(url)
        .addHeader("Authorization", "Bearer " + apiKey)
        .build();

    return httpClient.newCall(request).execute();
}

Gestion des erreurs

@Override
protected void storeData(...) {
    try {
        // Traitement
    } catch (AuthenticationException e) {
        logger.error("Authentication failed. Check your credentials.", e);
        throw new DataStoreException("Authentication failed", e);
    } catch (RateLimitException e) {
        logger.warn("Rate limit exceeded. Waiting...");
        Thread.sleep(60000);
        // Logique de retry
    } catch (Exception e) {
        logger.error("Unexpected error occurred", e);
        throw new DataStoreException("Failed to crawl data", e);
    }
}

Tests

Tests unitaires

public class ExampleDataStoreTest {

    private ExampleDataStore dataStore;

    @Before
    public void setUp() {
        dataStore = new ExampleDataStore();
    }

    @Test
    public void testGetName() {
        assertEquals("Example", dataStore.getName());
    }

    @Test
    public void testFetchDocuments() {
        // Test avec des mocks
    }
}

Exemple de configuration

Exemple de configuration dans l’interface d’administration:

Parametres

api.url=https://api.example.com/v1
api.key=your_api_key
max.items=1000
include.folders=folder1,folder2

Script

url=data.url
title=data.name
content=data.content
lastModified=data.updated_at
mimetype=data.content_type

Informations complementaires