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feat: Add ability to start bigtable emulator on fixed port #1193

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feat: Add ability to start bigtable emulator on fixed port #1193

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d71e962
Ability to start bigtable emulator with defined port number
rameshj28787 Mar 4, 2022
e93919d
remove unused import
rameshj28787 Mar 4, 2022
80b3861
cleaned imports
rameshj28787 Mar 4, 2022
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10 changes: 9 additions & 1 deletion ...cloud-bigtable-emulator/src/main/java/com/google/cloud/bigtable/emulator/v2/Emulator.java
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Expand Up @@ -40,6 +40,8 @@
/**
* Wraps the Bigtable emulator in a java api.
*
* Uses port-number from BIGTABLE_EMULATOR_HOST environment variable to create bundled emulator instances
*
* <p>This class will use the golang binaries embedded in this jar to launch the emulator as an
* external process and redirect its output to a {@link Logger}.
*/
Expand All @@ -52,6 +54,12 @@ public class Emulator {
private boolean isStopped = true;
private Thread shutdownHook;

//Set environment variable as <HOST>:<RANDOMPORT> Eg: 127.0.0.1:8465
private static final int PORT = Optional.ofNullable(System.getenv("BIGTABLE_EMULATOR_HOST"))
.filter(hostPort->hostPort.split(":").length>1)
.map(hostPort->hostPort.split(":")[1])
.map(Integer::parseInt).orElse(0);

private int port;
private ManagedChannel dataChannel;
private ManagedChannel adminChannel;
Expand Down Expand Up @@ -262,7 +270,7 @@ private static String getBundledResourcePath() {

/** Gets a random open port number. */
private static int getAvailablePort() {
try (ServerSocket serverSocket = new ServerSocket(0)) {
try (ServerSocket serverSocket = new ServerSocket(PORT)) {
return serverSocket.getLocalPort();
} catch (IOException e) {
throw new RuntimeException("Failed to find open port");
Expand Down