此代码示例可用于列出附加到 Pub/Sub 主题的所有订阅。
如需查看 SAP BTP 版本的 ABAP SDK for Google Cloud 代码示例的全面集合，请参阅 GitHub 上的代码示例代码库。
如需查看本地或任何云版本的 ABAP SDK for Google Cloud 代码示例的全面集合，请参阅 GitHub 上的代码示例代码库。
代码示例
SAP BTP 版本
" --------------------------------------------------------------------
" 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_list_subscriptions DEFINITION
PUBLIC FINAL
CREATE PUBLIC.
PUBLIC SECTION.
INTERFACES if_oo_adt_classrun.
ENDCLASS.
CLASS zcl_cs_list_subscriptions IMPLEMENTATION.
METHOD if_oo_adt_classrun~main.
" Data Declaration
DATA lv_q_pagesize TYPE string.
" Token that can be used in the next call to API to get next page of subscriptions.
DATA lv_q_pagetoken TYPE string.
DATA lv_p_projects_id TYPE string.
DATA lv_p_topics_id TYPE string.
DATA lt_subscriptions TYPE /goog/cl_pubsub_v1=>ty_t_string.
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 whose subscriptions will be listed.
lv_p_topics_id = 'SAMPLE_TOPIC'.
" Max number of subscriptions to be retrieved in 1 API Call.
lv_q_pagesize = 50.
WHILE sy-index = 1 OR lv_q_pagetoken IS NOT INITIAL.
" Call API method
lo_pubsub->list_subscriptions1( EXPORTING iv_q_pagesize = lv_q_pagesize
iv_q_pagetoken = lv_q_pagetoken
iv_p_projects_id = lv_p_projects_id
iv_p_topics_id = lv_p_topics_id
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 ) = abap_true.
LOOP AT ls_output-subscriptions ASSIGNING FIELD-SYMBOL(<ls_subscription>).
APPEND <ls_subscription> TO lt_subscriptions.
ENDLOOP.
ENDIF.
lv_q_pagetoken = ls_output-next_page_token.
ENDWHILE.
IF /goog/cl_http_client=>is_success( lv_ret_code ).
out->write( | Subscriptions attached to Topic were received!| ).
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.
本地或任何云版本
**********************************************************************
* 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_list_subscriptions1.
DATA:
lv_q_pagesize TYPE string,
" Token that can be used in the next call to API to get next page of subscriptions.
lv_q_pagetoken TYPE string,
lv_p_projects_id TYPE string,
lv_p_topics_id TYPE string,
lt_subscriptions TYPE /goog/cl_pubsub_v1=>ty_t_string.
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 whose subscriptions will be listed.
lv_p_topics_id = 'SAMPLE_TOPIC'.
" Max number of subscriptions to be retrieved in 1 API Call.
lv_q_pagesize = 50.
WHILE sy-index = 1 OR lv_q_pagetoken IS NOT INITIAL.
* Call API method
CALL METHOD lo_client->list_subscriptions1
EXPORTING
iv_q_pagesize = lv_q_pagesize
iv_q_pagetoken = lv_q_pagetoken
iv_p_projects_id = lv_p_projects_id
iv_p_topics_id = lv_p_topics_id
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 ) = abap_true.
LOOP AT ls_output-subscriptions ASSIGNING FIELD-SYMBOL(<ls_subscription>).
APPEND <ls_subscription> TO lt_subscriptions.
ENDLOOP.
ENDIF.
lv_q_pagetoken = ls_output-next_page_token.
ENDWHILE.
IF /goog/cl_http_client=>is_success( lv_ret_code ).
MESSAGE 'Subscriptions attached to Topic were received!' 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.