• Upload attachments to your ServiceNow instance and associated them to a specific record.
• Download one or more attachments.
• Delete attachments.
• Validate an attachment by comparing the computed hash of the attachment to the expected hash.
• Download attachment metadata. This metadata is generated by your ServiceNow instance when an attachment is uploaded.

/**
 * Helper class used to handle different Now service instances. 
 * It has an application scope or is a Singleton.
 */
@Singleton
class SdkManager @Inject constructor() {


    private var nowAttachmentService: NowAttachmentService? = null

    /**
     * Create the NowAttachmentService once in the lifetime of the application 
     * inside the Application class or another manager class
     * that will be injected into other classes via dagger/hilt.
     * NowAttachmentService should be created after initializing the NowSDK
     */
    suspend fun getNowAttachmentService(): NowAttachmentService? {
        if (nowAttachmentService != null) return nowAttachmentService

        return NowDataSDK.makeAttachmentService(URL("https://instance-name.service-now.com"))
            .getOrThrow()
            .also { this.nowAttachmentService = it }
    }
}

suspend fun fetchMetadata(sysId: String) {
    val response = runCatching {
        sdkManager.getNowAttachmentService()?.attachmentMetadata(sysId)?.execute()
    }

    if (response.isSuccess) {
        val nowAttachmentMetadata = response.getOrNull()?.body
    } else {
        Log.e("NowSDK", "result not successful")
    }
}

suspend fun fetchMultipleMetadata() {
    val filterQuery = "content_type=text/plain"
    val limit = 5

    val response = runCatching {
        sdkManager.getNowAttachmentService()?.attachmentMetadata(Filter(filterQuery), limit)?.execute()
    }

    if (response.isSuccess) {
        val attachmentMetadataList = response.getOrNull()?.body
    } else {
        Log.e("NowSDK", "result not successful")
    }
}

 suspend fun createAttachmentMetadataPaginator() {
  val filterQuery: String = "content_type=text/plain"
  val filter = filterQuery.let(::Filter)
  val limit = 10

  val paginator = sdkmanager.getNowAttachmentService()?.attachmentMetadataPaginator(filter, limit)
    ?.observe(object : PaginatorCallBack<NowAttachmentMetadata> {
      override fun onSuccess(response: Response<List<NowAttachmentMetadata>>) {
        // Handle response
      }

      override fun onFailure(e: NowDataError) {
        // Handle error
      }

    })
    ?: throw Exception("Response is null")

  // Use paginator operators to navigate. Example
  while (paginator.hasNext() && !paginator.isBusy()) {
    paginator.next()
  }
}

• first()
• hasNext()
• hasPrevious
• isBusy
• last()
• next()
• observe()
• previous()
• reset()