WIP

dbconn/Cargo.toml

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+[package]
+name = "dbconn"
+version = "0.0.1-a.0"
+authors = ["Dominik Werder <dominik.werder@gmail.com>"]
+edition = "2018"
+
+[dependencies]
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+tokio = { version = "1.4.0", features = ["rt-multi-thread", "io-util", "net", "time", "sync", "fs"] }
+tracing = "0.1.25"
+crc32fast = "1.2.1"
+arrayref = "0.3.6"
+byteorder = "1.4.3"
+futures-core = "0.3.14"
+futures-util = "0.3.14"
+bytes = "1.0.1"
+bincode = "1.3.3"
+#async-channel = "1"
+#dashmap = "3"
+tokio-postgres = { version = "0.7", features = ["runtime", "with-chrono-0_4", "with-serde_json-1"] }
+chrono = "0.4"
+err = { path = "../err" }
+netpod = { path = "../netpod" }
+taskrun = { path = "../taskrun" }

dbconn/src/lib.rs

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+use err::Error;
+use netpod::log::*;
+use netpod::{Channel, NodeConfig};
+use std::sync::Arc;
+use tokio_postgres::NoTls;
+
+pub async fn channel_exists(channel: &Channel, node_config: Arc<NodeConfig>) -> Result<bool, Error> {
+    let d = &node_config.cluster.database;
+    let uri = format!("postgresql://{}:{}@{}:{}/{}", d.user, d.pass, d.host, 5432, d.name);
+    let (cl, conn) = tokio_postgres::connect(&uri, NoTls).await?;
+    let cjh = tokio::spawn(async move {
+        if let Err(e) = conn.await {
+            error!("connection error: {}", e);
+        }
+        Ok::<_, Error>(())
+    });
+    let rows = cl
+        .query("select rowid from channels where name = $1::text", &[&channel.name])
+        .await?;
+    info!("channel_exists  {} rows", rows.len());
+    for row in rows {
+        info!("  db on channel search: {:?}", row);
+    }
+    drop(cjh);
+    Ok(true)
+}