Add few missing method

src/main/java/com/meilisearch/sdk/Client.java

@@ -9,6 +9,7 @@
 import com.meilisearch.sdk.json.JsonHandler;
 import com.meilisearch.sdk.model.Key;
 import com.meilisearch.sdk.model.Result;
+import com.meilisearch.sdk.model.Stats;
 import com.meilisearch.sdk.model.Task;
 import java.util.Date;
 import java.util.Map;
@@ -18,6 +19,7 @@
 public class Client {
     public Config config;
     public IndexesHandler indexesHandler;
+    public InstanceHandler instanceHandler;
     public TasksHandler tasksHandler;
     public KeysHandler keysHandler;
     public JsonHandler jsonHandler;
@@ -30,6 +32,7 @@ public class Client {
     public Client(Config config) {
         this.config = config;
         this.indexesHandler = new IndexesHandler(config);
+        this.instanceHandler = new InstanceHandler(config);
         this.tasksHandler = new TasksHandler(config);
         this.keysHandler = new KeysHandler(config);
         this.jsonHandler = config.jsonHandler;
@@ -171,6 +174,51 @@ public Task deleteIndex(String uid) throws MeilisearchException {
     //     return this.meiliSearchHttpRequest.post("/dumps", "", Dump.class);
     // }
 
+    /**
+     * Gets the status and availability of a Meilisearch instance
+     * https://docs.meilisearch.com/reference/api/health.html#health
+     *
+     * @return String containing the status of the Meilisearch instance from Meilisearch API
+     *     response
+     * @throws MeilisearchException if an error occurs
+     */
+    public String health() throws MeilisearchException {
+        return this.instanceHandler.health();
+    }
+
+    /**
+     * Gets the status and availability of a Meilisearch instance
+     * https://docs.meilisearch.com/reference/api/health.html#health
+     *
+     * @return True if the Meilisearch instance is available or false if it is not
+     * @throws MeilisearchException if an error occurs
+     */
+    public Boolean isHealthy() throws MeilisearchException {
+        return this.instanceHandler.isHealthy();
+    }
+
+    /**
+     * Gets extended information and metrics about indexes and the Meilisearch database
+     * https://docs.meilisearch.com/reference/api/stats.html#stats-object
+     *
+     * @return Stats instance from Meilisearch API response
+     * @throws MeilisearchException if an error occurs
+     */
+    public Stats getStats() throws MeilisearchException {
+        return this.instanceHandler.getStats();
+    }
+
+    /**
+     * Gets the version of Meilisearch instance
+     * https://docs.meilisearch.com/reference/api/version.html#version
+     *
+     * @return Meilisearch API response
+     * @throws MeilisearchException if an error occurs
+     */
+    public String getVersion() throws MeilisearchException {
+        return this.instanceHandler.getVersion();
+    }
+
     /**
      * Retrieves a task with the specified uid
      *

src/main/java/com/meilisearch/sdk/HttpClient.java

@@ -74,7 +74,7 @@ <T> T get(String api, String param, Class<T> targetClass, Class<?>... parameters
 
         if (httpResponse.getStatusCode() >= 400) {
             throw new MeilisearchApiException(
-                    jsonHandler.decode(httpResponse.getContent(), APIError.class));
+                    jsonHandler.decode(httpRequest.getContent(), APIError.class));
         }
         return httpResponse.getContent();
     }
@@ -95,7 +95,7 @@ <S, T> T post(String api, S body, Class<T> targetClass) throws MeilisearchExcept
 
         if (httpResponse.getStatusCode() >= 400) {
             throw new MeilisearchApiException(
-                    jsonHandler.decode(httpResponse.getContent(), APIError.class));
+                    jsonHandler.decode(httpRequest.getContent(), APIError.class));
         }
         return httpResponse.getContent();
     }
@@ -116,7 +116,7 @@ <S, T> T put(String api, S body, Class<T> targetClass) throws MeilisearchExcepti
 
         if (httpResponse.getStatusCode() >= 400) {
             throw new MeilisearchApiException(
-                    jsonHandler.decode(httpResponse.getContent(), APIError.class));
+                    jsonHandler.decode(httpRequest.getContent(), APIError.class));
         }
         return httpResponse.getContent();
     }
@@ -136,7 +136,7 @@ <T> T delete(String api, Class<T> targetClass) throws MeilisearchException {
 
         if (httpResponse.getStatusCode() >= 400) {
             throw new MeilisearchApiException(
-                    jsonHandler.decode(httpResponse.getContent(), APIError.class));
+                    jsonHandler.decode(httpRequest.getContent(), APIError.class));
         }
         return httpResponse.getContent();
     }

src/main/java/com/meilisearch/sdk/Index.java

@@ -1,6 +1,7 @@
 package com.meilisearch.sdk;
 
 import com.meilisearch.sdk.exceptions.MeilisearchException;
+import com.meilisearch.sdk.model.IndexStats;
 import com.meilisearch.sdk.model.Result;
 import com.meilisearch.sdk.model.SearchResult;
 import com.meilisearch.sdk.model.Settings;
@@ -26,6 +27,7 @@ public class Index implements Serializable {
     @ToString.Exclude protected TasksHandler tasksHandler;
     @ToString.Exclude protected Search search;
     @ToString.Exclude protected SettingsHandler settingsHandler;
+    @ToString.Exclude protected InstanceHandler instanceHandler;
 
     /**
      * Sets the Meilisearch configuration for the index
@@ -38,6 +40,7 @@ void setConfig(Config config) {
         this.tasksHandler = new TasksHandler(config);
         this.search = new Search(config);
         this.settingsHandler = new SettingsHandler(config);
+        this.instanceHandler = new InstanceHandler(config);
     }
 
     /**
@@ -600,6 +603,17 @@ public Task resetTypoToleranceSettings() throws MeilisearchException {
         return this.settingsHandler.resetTypoToleranceSettings(this.uid);
     }
 
+    /**
+     * Gets extended information and metrics about indexes and the Meilisearch database
+     * https://docs.meilisearch.com/reference/api/stats.html#stats-object
+     *
+     * @return Meilisearch API response
+     * @throws MeilisearchException if an error occurs
+     */
+    public IndexStats getStats() throws MeilisearchException {
+        return this.instanceHandler.getIndexStats(this.uid);
+    }
+
     /**
      * Retrieves an index tasks by its ID
      *

src/main/java/com/meilisearch/sdk/InstanceHandler.java

@@ -0,0 +1,80 @@
+package com.meilisearch.sdk;
+
+import com.meilisearch.sdk.exceptions.MeilisearchException;
+import com.meilisearch.sdk.model.IndexStats;
+import com.meilisearch.sdk.model.Stats;
+
+public class InstanceHandler {
+    HttpClient httpClient;
+
+    /**
+     * Creates and sets up an instance of InstanceHandler
+     *
+     * @param config Meilisearch configuration
+     */
+    InstanceHandler(Config config) {
+        this.httpClient = config.httpClient;
+    }
+
+    /**
+     * Gets the status and availability of a Meilisearch instance
+     * https://docs.meilisearch.com/reference/api/health.html#health
+     *
+     * @return Meilisearch API response
+     * @throws MeilisearchException if an error occurs
+     */
+    public String health() throws MeilisearchException {
+        return httpClient.get("/health", String.class);
+    }
+
+    /**
+     * Gets the status and availability of a Meilisearch instance
+     * https://docs.meilisearch.com/reference/api/health.html#health
+     *
+     * @return Meilisearch API response
+     * @throws MeilisearchException if an error occurs
+     */
+    public boolean isHealthy() throws MeilisearchException {
+        try {
+            this.health();
+            return true;
+        } catch (MeilisearchException e) {
+            return false;
+        }
+    }
+
+    /**
+     * Gets extended information and metrics about indexes and the Meilisearch database
+     * https://docs.meilisearch.com/reference/api/stats.html#stats-object
+     *
+     * @return Meilisearch API response
+     * @throws MeilisearchException if an error occurs
+     */
+    public Stats getStats() throws MeilisearchException {
+        return httpClient.get("/stats", Stats.class);
+    }
+
+    /**
+     * Gets extended information and metrics about indexes and the Meilisearch database
+     * https://docs.meilisearch.com/reference/api/stats.html#stats-object
+     *
+     * @param uid Index identifier to the requested
+     * @return Meilisearch API response
+     * @throws MeilisearchException if an error occurs
+     */
+    public IndexStats getIndexStats(String uid) throws MeilisearchException {
+        String requestQuery = "/indexes/" + uid + "/stats";
+        return httpClient.<IndexStats>get(requestQuery, IndexStats.class);
+    }
+
+    /**
+     * Gets the version of Meilisearch instance
+     * https://docs.meilisearch.com/reference/api/version.html#version
+     *
+     * @return Meilisearch API response
+     * @throws MeilisearchException if an error occurs
+     */
+    public String getVersion() throws MeilisearchException {
+        return httpClient.get("/version", String.class);
+    }
+}

src/test/java/com/meilisearch/integration/InstanceTest.java

@@ -0,0 +1,77 @@
+package com.meilisearch.integration;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import com.meilisearch.integration.classes.AbstractIT;
+import com.meilisearch.sdk.Index;
+import com.meilisearch.sdk.model.IndexStats;
+import com.meilisearch.sdk.model.Stats;
+import com.meilisearch.sdk.model.Task;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Tag;
+import org.junit.jupiter.api.Test;
+
+@Tag("integration")
+public class InstanceTest extends AbstractIT {
+
+    @BeforeEach
+    public void initialize() {
+        setUp();
+    }
+
+    @AfterAll
+    static void cleanMeilisearch() {
+        cleanup();
+    }
+
+    /** Test Health */
+    @Test
+    public void testHealth() throws Exception {
+        String health = client.health();
+
+        assertEquals(health, "{\"status\":\"available\"}");
+    }
+
+    /** Test Is Healthy */
+    @Test
+    public void testIsHealthy() throws Exception {
+        Boolean healthy = client.isHealthy();
+
+        assertTrue(healthy);
+    }
+
+    /** Test Get Version */
+    @Test
+    public void testGetVersion() throws Exception {
+        String version = client.getVersion();
+
+        assertNotNull(version);
+    }
+
+    /** Test Get Stats */
+    @Test
+    public void testGetStats() throws Exception {
+        Stats stats = client.getStats();
+
+        assertNotNull(stats);
+        assertNotNull(stats.getDatabaseSize());
+        assertNotNull(stats.getIndexes());
+    }
+
+    /** Test Get Index Stats */
+    @Test
+    public void testGetIndexStats() throws Exception {
+        String indexUid = "IndexStats";
+        Index index = client.index(indexUid);
+        Task task = client.createIndex(indexUid);
+
+        client.waitForTask(task.getUid());
+        IndexStats stats = index.getStats();
+
+        assertNotNull(stats);
+        assertEquals(0, stats.getNumberOfDocuments());
+        assertFalse(stats.isIndexing());
+        assertNotNull(stats.getFieldDistribution());
+    }
+}