* `StackImpact.setAutoProfilingMode(boolean isAutoProfilingMode)` (Optional) If set to `false`, disables automatic profiling and reporting. Focused profiling should be used instead. Useful for environments without support for timers or background tasks.

Use `StackImpact.profile()` to instruct the agent when to start and stop profiling. The agent decides if and which profiler is activated. Normally, this method should be used in repeating code, such as request or event handlers. Usage example:

ProfileSpan span = StackImpact.profile();

span.stop();

Import `ProfileSpan` object from `com.stackimpact.agent.ProfileSpan`.

package examples;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.io.InputStreamReader;

import java.io.OutputStreamWriter;

import java.io.BufferedReader;

import java.io.Writer;

import java.util.Random;

import com.amazonaws.services.lambda.runtime.RequestStreamHandler;

import com.amazonaws.services.lambda.runtime.Context;

import org.json.simple.JSONObject;

import org.json.simple.JSONArray;

import org.json.simple.parser.ParseException;

import org.json.simple.parser.JSONParser;

import com.stackimpact.agent.StackImpact;

import com.stackimpact.agent.ProfileSpan;

public class Hello implements RequestStreamHandler {

JSONParser parser = new JSONParser();

// initialize StackImpact agent

static {

StackImpact.setAutoProfilingMode(false);

StackImpact.start("agent key here", "LambdaJavaApp");

}

public void handleRequest(InputStream inputStream, OutputStream outputStream, Context context) throws IOException {

ProfileSpan span = StackImpact.profile();

// simulate CPU work

try {

Random rand = new Random();

for (int i = 0; i < 20 * 1000000; i++) {

rand.nextInt(100000);

}

}

catch(Exception ex) {

}

// end CPU work

BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));

JSONObject responseJson = new JSONObject();

String responseCode = "200";

try {

JSONObject event = (JSONObject)parser.parse(reader);

JSONObject responseBody = new JSONObject();

responseBody.put("input", event.toJSONString());

responseBody.put("message", "Hello");

JSONObject headerJson = new JSONObject();

headerJson.put("x-custom-header", "my custom header value");

responseJson.put("isBase64Encoded", false);

responseJson.put("statusCode", responseCode);

responseJson.put("headers", headerJson);

responseJson.put("body", responseBody.toString());

} catch(ParseException pex) {

responseJson.put("statusCode", "400");

responseJson.put("exception", pex);

}

OutputStreamWriter writer = new OutputStreamWriter(outputStream, "UTF-8");

writer.write(responseJson.toJSONString());

writer.close();

span.stop();

}

}

import java.util.Random;

import com.stackimpact.agent.StackImpact;

import com.stackimpact.agent.ProfileSpan;

public class SampleApp {

public static void main(String args[]) throws Exception {

StackImpact.start("agent key here", "SampleJavaApp");

while(true) {

someRequestHandler();

}

}

public static void someRequestHandler() {

ProfileSpan span = StackImpact.profile();

try {

Random rand = new Random();

for (int i = 0; i < 20 * 1000000; i++) {

rand.nextInt(100000);

}

Thread.sleep(rand.nextInt(200));

}

catch(Exception ex) {

ex.printStackTrace();

}

span.stop();

}

}

set -e

rm -f /tmp/libstackimpact-*

$JAVA_HOME/bin/javac -cp ../../dist/stackimpact.jar SampleApp.java

$JAVA_HOME/bin/java -cp ../../dist/stackimpact.jar:. SampleApp