telnyx-voice-advanced-java

<!-- Maven -->
<dependency>
    <groupId>com.telnyx.sdk</groupId>
    <artifactId>telnyx</artifactId>
    <version>6.89.0</version>
</dependency>

// Gradle
implementation("com.telnyx.sdk:telnyx:6.89.0")

import com.telnyx.sdk.client.TelnyxClient;
import com.telnyx.sdk.client.okhttp.TelnyxOkHttpClient;

TelnyxClient client = TelnyxOkHttpClient.fromEnv();

import com.telnyx.sdk.errors.TelnyxServiceException;

try {
    var result = client.messages().send(params);
} catch (TelnyxServiceException e) {
    System.err.println("API error " + e.statusCode() + ": " + e.getMessage());
    if (e.statusCode() == 422) {
        System.err.println("Validation error — check required fields and formats");
    } else if (e.statusCode() == 429) {
        // Rate limited — wait and retry with exponential backoff
        Thread.sleep(1000);
    }
}

import com.telnyx.sdk.models.calls.actions.ActionJoinAiAssistantParams;
import com.telnyx.sdk.models.calls.actions.ActionJoinAiAssistantResponse;

ActionJoinAiAssistantParams params = ActionJoinAiAssistantParams.builder()
    .callControlId("v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ")
    .conversationId("v3:abc123")
    .participant(ActionJoinAiAssistantParams.Participant.builder()
        .id("v3:abc123def456")
        .role(ActionJoinAiAssistantParams.Participant.Role.USER)
        .build())
    .build();
ActionJoinAiAssistantResponse response = client.calls().actions().joinAiAssistant(params);

import com.telnyx.sdk.models.calls.actions.ActionUpdateClientStateParams;
import com.telnyx.sdk.models.calls.actions.ActionUpdateClientStateResponse;

ActionUpdateClientStateParams params = ActionUpdateClientStateParams.builder()
    .callControlId("v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ")
    .clientState("aGF2ZSBhIG5pY2UgZGF5ID1d")
    .build();
ActionUpdateClientStateResponse response = client.calls().actions().updateClientState(params);

import com.telnyx.sdk.models.calls.actions.ActionStartConversationRelayParams;
import com.telnyx.sdk.models.calls.actions.ActionStartConversationRelayResponse;

ActionStartConversationRelayResponse response = client.calls().actions().startConversationRelay("v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ");

import com.telnyx.sdk.models.calls.actions.ActionStopConversationRelayParams;
import com.telnyx.sdk.models.calls.actions.ActionStopConversationRelayResponse;

ActionStopConversationRelayResponse response = client.calls().actions().stopConversationRelay("v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ");

import com.telnyx.sdk.models.calls.actions.ActionSendDtmfParams;
import com.telnyx.sdk.models.calls.actions.ActionSendDtmfResponse;

ActionSendDtmfParams params = ActionSendDtmfParams.builder()
    .callControlId("v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ")
    .digits("1www2WABCDw9")
    .build();
ActionSendDtmfResponse response = client.calls().actions().sendDtmf(params);

import com.telnyx.sdk.models.calls.actions.ActionStartSiprecParams;
import com.telnyx.sdk.models.calls.actions.ActionStartSiprecResponse;

ActionStartSiprecResponse response = client.calls().actions().startSiprec("v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ");

import com.telnyx.sdk.models.calls.actions.ActionStopSiprecParams;
import com.telnyx.sdk.models.calls.actions.ActionStopSiprecResponse;

ActionStopSiprecResponse response = client.calls().actions().stopSiprec("v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ");

import com.telnyx.sdk.models.calls.actions.ActionStartNoiseSuppressionParams;
import com.telnyx.sdk.models.calls.actions.ActionStartNoiseSuppressionResponse;

ActionStartNoiseSuppressionResponse response = client.calls().actions().startNoiseSuppression("v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ");

import com.telnyx.sdk.models.calls.actions.ActionStopNoiseSuppressionParams;
import com.telnyx.sdk.models.calls.actions.ActionStopNoiseSuppressionResponse;

ActionStopNoiseSuppressionResponse response = client.calls().actions().stopNoiseSuppression("v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ");

import com.telnyx.sdk.models.calls.actions.ActionSwitchSupervisorRoleParams;
import com.telnyx.sdk.models.calls.actions.ActionSwitchSupervisorRoleResponse;

ActionSwitchSupervisorRoleParams params = ActionSwitchSupervisorRoleParams.builder()
    .callControlId("v3:550e8400-e29b-41d4-a716-446655440000_gRU1OGRkYQ")
    .role(ActionSwitchSupervisorRoleParams.Role.BARGE)
    .build();
ActionSwitchSupervisorRoleResponse response = client.calls().actions().switchSupervisorRole(params);

import com.telnyx.sdk.core.UnwrapWebhookParams;
import com.telnyx.sdk.core.http.Headers;

// In your webhook handler (e.g., Spring — use raw body):
@PostMapping("/webhooks")
public ResponseEntity<String> handleWebhook(
    @RequestBody String payload,
    HttpServletRequest request) {
  try {
    Headers headers = Headers.builder()
        .put("telnyx-signature-ed25519", request.getHeader("telnyx-signature-ed25519"))
        .put("telnyx-timestamp", request.getHeader("telnyx-timestamp"))
        .build();
    var event = client.webhooks().unwrap(
        UnwrapWebhookParams.builder()
            .body(payload)
            .headers(headers)
            .build());
    // Signature valid — process the event
    System.out.println("Received webhook event");
    return ResponseEntity.ok("OK");
  } catch (Exception e) {
    System.err.println("Webhook verification failed: " + e.getMessage());
    return ResponseEntity.badRequest().body("Invalid signature");
  }
}