A snippet to demonstrate editing Cachet Incident message text.

EditCachetIncidentMsg.java

...

package fi.XXX.digitraffic.status.dto.cachet;

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.annotation.JsonProperty;

@JsonIgnoreProperties(ignoreUnknown = true)
public class IncidentEditMsgDto {
    public final Integer incident;
    public final String message;

    public IncidentEditMsgDto(
            @JsonProperty("id") int incident,
            @JsonProperty("message") String message) {
        this.message = message;
        this.incident = incident;
    }
}

...
package fi.XXX.digitraffic.status.service;

import fi.XXX.digitraffic.status.dto.cachet.IncidentEditMsgDto;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.util.UriComponentsBuilder;

public class CachetService {

    private final RestTemplate restTemplate;

    public CachetService(String apiBase, String apiKey) {
        this.apiBase = apiBase;

        headers = new HttpHeaders();
        headers.set("Accept", MediaType.APPLICATION_JSON_VALUE);
        headers.set("X-Cachet-Token", apiKey);
        restTemplate = new RestTemplate();
    }

    private void  appendToIncidentMessage(IncidentDto incident, String messageTail) {
        String newMessage = incident.message + messageTail;

        final IncidentEditMsgDto editIncident = new IncidentEditMsgDto(incident.incident, newMessage);

        final UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(apiBase + "/incidents").pathSegment(editIncident.incident.toString());
        final HttpEntity<IncidentEditMsgDto> entity = new HttpEntity<>(editIncident, headers);

        try {
            restTemplate.exchange(builder.toUriString(), HttpMethod.PUT, entity, byte[].class);
        } catch (RestClientException e) {
            LOG.error(String.format("Error in request: %s, Error: %s", builder.toUriString(), e.getMessage()));
            System.exit(1);
        }
    }
}