```java CloseableHttpClient httpClient = HttpClients.createDefault(); ``` ```java HttpGet httpGet = new HttpGet("http://example.com/api/resource"); ``` ```java CloseableHttpResponse response = httpClient.execute(httpGet); ``` ```java int statusCode = response.getStatusLine().getStatusCode(); String responseBody = EntityUtils.toString(response.getEntity()); ``` ```java response.close(); httpClient.close(); ``` ```java 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.impl.client.HttpClients; import org.apache.http.util.EntityUtils; public class HttpClientExample { public static void main(String[] args) { try { CloseableHttpClient httpClient = HttpClients.createDefault(); HttpGet httpGet = new HttpGet("http://example.com/api/resource"); CloseableHttpResponse response = httpClient.execute(httpGet); int statusCode = response.getStatusLine().getStatusCode(); String responseBody = EntityUtils.toString(response.getEntity()); System.out.println("Status code: " + statusCode); System.out.println("Response body: " + responseBody); response.close(); httpClient.close(); } catch (Exception e) { e.printStackTrace(); } } } ```

```xml <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5.13</version> </dependency> ``` ```java HttpClient httpClient = HttpClientBuilder.create().build(); ``` ```java HttpGet httpGet = new HttpGet("https://api.example.com/resource"); httpGet.addHeader("Authorization", "Bearer YOUR_ACCESS_TOKEN"); ``` ```java HttpResponse response = httpClient.execute(httpGet); int statusCode = response.getStatusLine().getStatusCode(); HttpEntity entity = response.getEntity(); String responseBody = EntityUtils.toString(entity); ``` ```java JSONObject jsonResponse = new JSONObject(responseBody); String data = jsonResponse.getString("data"); ``` ```java import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.HttpClientBuilder; import org.apache.http.util.EntityUtils; import org.json.JSONObject; public class RESTApiClient { public static void main(String[] args) { try { HttpClient httpClient = HttpClientBuilder.create().build(); HttpGet httpGet = new HttpGet("https://api.example.com/resource"); httpGet.addHeader("Authorization", "Bearer YOUR_ACCESS_TOKEN"); HttpResponse response = httpClient.execute(httpGet); int statusCode = response.getStatusLine().getStatusCode(); HttpEntity entity = response.getEntity(); String responseBody = EntityUtils.toString(entity); if (statusCode == 200) { JSONObject jsonResponse = new JSONObject(responseBody); String data = jsonResponse.getString("data"); System.out.println("Response data: " + data); } else { System.out.println("Error: " + responseBody); } } catch (Exception e) { e.printStackTrace(); } } } ```

```xml <dependencies> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5.10</version> </dependency> </dependencies> ``` ```java import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpPost; import org.apache.http.entity.ContentType; import org.apache.http.entity.mime.MultipartEntityBuilder; import org.apache.http.impl.client.HttpClientBuilder; import java.io.File; import java.io.IOException; public class FileUploader { public static void main(String[] args) { HttpClient httpClient = HttpClientBuilder.create().build(); HttpPost httpPost = new HttpPost(url); File file = new File("path/to/file.txt"); HttpEntity entity = MultipartEntityBuilder.create() .addBinaryBody("file", file, ContentType.DEFAULT_BINARY, file.getName()) .build(); httpPost.setEntity(entity); try { HttpResponse response = httpClient.execute(httpPost); if (response.getStatusLine().getStatusCode() == 200) { } else { } } catch (IOException e) { e.printStackTrace(); } } } ``` ```java import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.entity.BufferedHttpEntity; import org.apache.http.impl.client.HttpClientBuilder; import org.apache.http.util.EntityUtils; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; public class FileDownloader { public static void main(String[] args) { HttpClient httpClient = HttpClientBuilder.create().build(); HttpGet httpGet = new HttpGet(url); try { HttpResponse response = httpClient.execute(httpGet); if (response.getStatusLine().getStatusCode() == 200) { HttpEntity entity = response.getEntity(); BufferedHttpEntity bufferedEntity = new BufferedHttpEntity(entity); InputStream inputStream = bufferedEntity.getContent(); OutputStream outputStream = new FileOutputStream("path/to/save/file.txt"); int bytesRead; byte[] buffer = new byte[1024]; while ((bytesRead = inputStream.read(buffer)) != -1) { outputStream.write(buffer, 0, bytesRead); } outputStream.close(); inputStream.close(); EntityUtils.consume(entity); } else { } } catch (IOException e) { e.printStackTrace(); } } } ```

```java HttpClient client = HttpClient.newBuilder() .connectTimeout(Duration.ofMillis(connectionTimeout)) .readTimeout(Duration.ofMillis(readTimeout)) .build(); ``` ```java try { HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString()); System.out.println(response.body()); } catch (SocketTimeoutException e) { e.printStackTrace(); } ``` ```java HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString()); int statusCode = response.statusCode(); if (statusCode >= 200 && statusCode < 300) { System.out.println(response.body()); } else if (statusCode >= 400 && statusCode < 500) { } else if (statusCode >= 500 && statusCode < 600) { } else { } ``` ```java HttpClient client = HttpClient.newBuilder() .connectTimeout(Duration.ofMillis(connectionTimeout)) .readTimeout(Duration.ofMillis(readTimeout)) .build(); ```

```xml <dependency> <groupId>com.appmon4j</groupId> <artifactId>appmon4j-core</artifactId> <version>1.0.0</version> </dependency> ``` ```java @Trace public void criticalMethod() { } ``` ```java public static void main(String[] args) { Appmon4j.start(); } ``` ```java // MyClass.java import com.appmon4j.core.annotation.Trace; public class MyClass { @Trace public void criticalMethod() { } } // Main.java import com.appmon4j.core.Appmon4j; public class Main { public static void main(String[] args) { Appmon4j.start(); MyClass obj = new MyClass(); obj.criticalMethod(); Appmon4j.stop(); } } ```

``` <dependency> <groupId>com.appmon4j</groupId> <artifactId>appmon4j-core</artifactId> <version>1.0.0</version> </dependency> ``` ```java import com.appmon4j.core.Appmon4j; import com.appmon4j.core.Monitor; import com.appmon4j.core.ThreadMonitor; import com.appmon4j.core.ThreadStatus; public class MyApp { public static void main(String[] args) { Monitor monitor = Appmon4j.createMonitor(); ThreadMonitor threadMonitor = monitor.createThreadMonitor(); Thread myThread = new Thread(() -> { // ... threadMonitor.markStatus(Thread.currentThread(), ThreadStatus.COMPLETED); }); myThread.start(); monitor.waitForCompletion(); System.out.println(threadMonitor.getThreadStatuses()); } } ```

```xml <dependency> <groupId>org.appmon4j</groupId> <artifactId>appmon4j-core</artifactId> <version>1.0.0</version> </dependency> ``` ```java import org.appmon4j.core.AbstractMonitor; import org.appmon4j.core.MonitorData; public class CustomMonitor extends AbstractMonitor { private static CustomMonitor instance; public static CustomMonitor getInstance() { if (instance == null) { instance = new CustomMonitor(); } return instance; } protected CustomMonitor() { super("CustomMonitor"); } @Override public MonitorData collectData() { MonitorData data = new MonitorData(); data.put("metric1", getMetric1Value()); data.put("metric2", getMetric2Value()); return data; } private String getMetric1Value() { return "metric1Value"; } private String getMetric2Value() { return "metric2Value"; } } ``` ```yaml monitors: - name: CustomMonitor thresholds: metric1: [">", 100] metric2: ["<", 50] actions: - name: EmailAction to: [admin@example.com] subject: "Alert: Metrics threshold exceeded" Metric1 value: {{metric1}} Metric2 value: {{metric2}} ``` ```java import org.appmon4j.core.AppMon4j; import org.appmon4j.core.actions.EmailActionFactory; import org.appmon4j.core.monitor.MonitorFactory; public class Application { public static void main(String[] args) { AppMon4j.initialize(); AppMon4j.addMonitor(MonitorFactory.createMonitor(CustomMonitor.class)); AppMon4j.addAction(EmailActionFactory.createAction("EmailAction")); AppMon4j.start(); AppMon4j.stop(); } } ```

```java import com.appmon4j.core.core.Appmon4j; public class MyApp { public static void main(String[] args) { Appmon4j.initialize(); Appmon4j.registerMetricCollector(metric -> { }); Appmon4j.registerEventTrigger("MyEvent", () -> { }); Appmon4j.triggerEvent("MyEvent"); Appmon4j.stop(); } } ``` ``` appmon4j.appName=MyApp appmon4j.metrics.enabled=true appmon4j.events.enabled=true appmon4j.log.level=INFO ```

```xml <dependency> <groupId>org.appmon4j</groupId> <artifactId>appmon4j-core</artifactId> <version>1.0.0</version> </dependency> ``` ```java import org.appmon4j.core.Appmon4j; import org.appmon4j.core.config.Configuration; public class MyApp { public static void main(String[] args) { Appmon4j appmon4j = new Appmon4j(); Configuration configuration = Configuration.fromFile("appmon4j.yml"); appmon4j.setConfiguration(configuration); appmon4j.start(); } } ``` ```java import org.appmon4j.core.Logger; public class MyClass { private static final Logger logger = Appmon4j.logger(MyClass.class); public void myMethod() { } } ``` ```java import org.appmon4j.core.Monitor; public class MyClass { @Monitor public void myMethod() { } } ``` ```yaml monitors: - name: MyMethodMonitor include: - com.example.MyClass.myMethod exclude: - com.example.MyClass.anotherMethod logLevel: INFO logs: - name: myLogFile file: /path/to/log/file.log level: DEBUG ```