Pubblicare argomenti

Questo esempio di codice può essere utilizzato per pubblicare un file "Hello World!" messaggio in un argomento Pub/Sub.

Per una raccolta completa di esempi di codice per Versione SAP BTP dell'SDK ABAP per Google Cloud, consulta il repository di codice di esempio su GitHub.

Per una raccolta completa di esempi di codice per la versione on-premise o qualsiasi versione cloud di ABAP SDK for Google Cloud, consulta il repository di esempi di codice su GitHub.

Esempio di codice

Versione SAP BTP

" --------------------------------------------------------------------
"  Copyright 2024 Google LLC                                         -
"                                                                    -
"  Licensed under the Apache License, Version 2.0 (the "License");   -
"  you may not use this file except in compliance with the License.  -
"  You may obtain a copy of the License at                           -
"      https://www.apache.org/licenses/LICENSE-2.0                   -
"  Unless required by applicable law or agreed to in writing,        -
"  software distributed under the License is distributed on an       -
"  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,      -
"  either express or implied.                                        -
"  See the License for the specific language governing permissions   -
"  and limitations under the License.                                -
" --------------------------------------------------------------------
CLASS zcl_cs_publish_topics DEFINITION
  PUBLIC FINAL
  CREATE PUBLIC.

  PUBLIC SECTION.
    INTERFACES if_oo_adt_classrun.
ENDCLASS.


CLASS zcl_cs_publish_topics IMPLEMENTATION.
  METHOD if_oo_adt_classrun~main.
    " Data Declaration
    DATA lv_p_projects_id TYPE string.
    DATA lv_p_topics_id   TYPE string.
    DATA ls_input         TYPE /goog/cl_pubsub_v1=>ty_023.

    TRY.

        " Open HTTP Connection
        DATA(lo_pubsub) = NEW /goog/cl_pubsub_v1( iv_key_name = 'PUBSUB_DEMO' ).

        " Populate relevant parameters
        " Derive project id from the client object
        lv_p_projects_id = lo_pubsub->gv_project_id.
        " Name of the topic to which message will be sent.
        lv_p_topics_id   = 'SAMPLE_TOPIC'.

        " ls_input-messages contains a list of messages that will be published to the Topic.
        APPEND INITIAL LINE TO ls_input-messages ASSIGNING FIELD-SYMBOL(<ls_message>).
        IF <ls_message> IS ASSIGNED.
          " The message is sent as a base64 encoded string in the data field.
          <ls_message>-data = cl_http_utility=>encode_base64( unencoded = 'Hello World!' ).
        ENDIF.

        " Call API method
        lo_pubsub->publish_topics( EXPORTING iv_p_projects_id = lv_p_projects_id
                                             iv_p_topics_id   = lv_p_topics_id
                                             is_input         = ls_input
                                   IMPORTING es_output        = DATA(ls_output)
                                             ev_ret_code      = DATA(lv_ret_code)
                                             ev_err_text      = DATA(lv_err_text)
                                             es_err_resp      = DATA(ls_err_resp) ).

        IF /goog/cl_http_client=>is_success( lv_ret_code ).
          out->write( | Message was successfully published to Pub/Sub!| ).
        ELSE.
          out->write( | Error occurred: { lv_err_text }| ).
        ENDIF.

        " Close HTTP Connection
        lo_pubsub->close( ).

      CATCH /goog/cx_sdk INTO DATA(lo_exception).
        lv_err_text = lo_exception->get_text( ).
        out->write( |Exception occurred: { lv_err_text } | ).
    ENDTRY.
  ENDMETHOD.
ENDCLASS.

Versione on-premise o cloud

**********************************************************************
*  Copyright 2023 Google LLC                                         *
*                                                                    *
*  Licensed under the Apache License, Version 2.0 (the "License");   *
*  you may not use this file except in compliance with the License.  *
*  You may obtain a copy of the License at                           *
*      https://www.apache.org/licenses/LICENSE-2.0                   *
*  Unless required by applicable law or agreed to in writing,        *
*  software distributed under the License is distributed on an       *
*  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,      *
*  either express or implied.                                        *
*  See the License for the specific language governing permissions   *
*  and limitations under the License.                                *
**********************************************************************

REPORT zr_publish_topics.

DATA:
  lv_p_projects_id TYPE string,
  lv_p_topics_id   TYPE string,
  ls_input         TYPE /goog/cl_pubsub_v1=>ty_023.

TRY.

* Open HTTP Connection
    DATA(lo_client) = NEW /goog/cl_pubsub_v1( iv_key_name = 'CLIENT_KEY' ).

* Populate relevant parameters
    " Derive project id from the client object
    lv_p_projects_id = lo_client->gv_project_id.
    " Name of the topic to which message will be sent.
    lv_p_topics_id   = 'SAMPLE_TOPIC'.

    "ls_input-messages contains a list of messages that will be published to the Topic.
    APPEND INITIAL LINE TO ls_input-messages ASSIGNING FIELD-SYMBOL(<ls_message>).
    IF <ls_message> IS ASSIGNED .
      "The message is sent as a base64 encoded string in the data field.
      <ls_message>-data     = cl_http_utility=>encode_base64( unencoded = 'Hello World!' ).
    ENDIF.

* Call API method
    CALL METHOD lo_client->publish_topics
      EXPORTING
        iv_p_projects_id = lv_p_projects_id
        iv_p_topics_id   = lv_p_topics_id
        is_input         = ls_input
      IMPORTING
*       ES_RAW           =
        es_output        = DATA(ls_output)
        ev_ret_code      = DATA(lv_ret_code)
        ev_err_text      = DATA(lv_err_text)
        es_err_resp      = DATA(ls_err_resp).

    IF /goog/cl_http_client=>is_success( lv_ret_code ).
      MESSAGE 'Message was successfully published to Pub/Sub!' TYPE 'S'.
    ELSE.
      MESSAGE lv_err_text TYPE 'E'.
    ENDIF.

* Close HTTP Connection
    lo_client->close( ).

  CATCH /goog/cx_sdk INTO DATA(lo_exception).
    MESSAGE lo_exception->get_text( ) TYPE 'E'.
ENDTRY.