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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Cloud Pub/Sub API ignores FlowControlSettings in BatchingSettings","articleBody":"Gax has introduced FlowControl settings in [1] (see setFlowControlSettings). This makes it seem like Flow Control is available in the APIs that support BatchSettings, such as Pub/Sub's Publisher [2].  There are two issues here:\r\n1. FlowControlSettings settings in GAX have no way of communicating to the user whether a particular client implements them.  This is actually true of all batching settings.  This is a recipe for confusion. \r\n2. In the particular case of Pub/Sub client, publisher flow control is a desirable feature in itself.  We either need to decide to implement it and turn this bug into a feature request and offer explicit failure and documentation if we decided not to.\r\n\r\n\r\n[1] http://googleapis.github.io/gax-java/1.4.1/apidocs/com/google/api/gax/batching/BatchingSettings.Builder.html#setFlowControlSettings-com.google.api.gax.batching.FlowControlSettings-\r\n[2] https://github.com/googleapis/google-cloud-java/blob/master/google-cloud-clients/google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/Publisher.java#L124\r\nThanks for stopping by to let us know something could be better!\r\n\r\n\r\n\r\n**PLEASE READ**: If you have a support contract with Google, please create an issue in the [support console](https://cloud.google.com/support/) instead of filing on GitHub. This will ensure a timely response.\r\n\r\nPlease run down the following list and make sure you've tried the usual \"quick fixes\":\r\n\r\n  - Search the issues already opened: https://github.com/googleapis/google-cloud-java/issues\r\n  - Check for answers on StackOverflow: http://stackoverflow.com/questions/tagged/google-cloud-platform\r\n\r\nIf you are still having issues, please be sure to include as much information as possible:\r\n\r\n#### Environment details\r\n\r\n1. Specify the API at the beginning of the title (for example, \"BigQuery: ...\")\r\n   General, Core, and Other are also allowed as types\r\n2. OS type and version:\r\n3. Java version:\r\n4. google-cloud-java version(s):\r\n\r\n#### Steps to reproduce\r\n\r\n  1. ?\r\n  2. ? \r\n\r\n#### Code example\r\n\r\n```java\r\n// example\r\n```\r\n\r\n#### Stack trace\r\n```\r\nAny relevant stacktrace here.\r\n```\r\n\r\n#### External references such as API reference guides used\t\r\n\r\n- ?\t\r\n\r\n#### Any additional information below\t\r\n\r\n\r\nMaking sure to follow these steps will guarantee the quickest resolution possible.\r\n\r\nThanks!\r\n","author":{"url":"https://github.com/kir-titievsky","@type":"Person","name":"kir-titievsky"},"datePublished":"2019-08-29T18:23:39.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/25/java-pubsub/issues/25"}