com.spotify.helios.testing

Class InMemoryLogStreamFollower

java.lang.Object

com.spotify.helios.testing.InMemoryLogStreamFollower

All Implemented Interfaces:

LogStreamFollower

public class InMemoryLogStreamFollower
extends Object
implements LogStreamFollower

A LogStreamFollower implementation that captures all container stdout/stderr to memory. Provided mostly for debugging and other limited use cases, since extended container output will be kept in memory without bound.

Method Summary

Modifier and Type	Method and Description
static InMemoryLogStreamFollower	create()
void	followLog(JobId jobId, String containerId, Iterator<com.spotify.docker.client.LogMessage> logStream) Follows the specified log stream until it doesn't have any more log messages available.
byte[]	getStderr(JobId jobId) Get all the stderr that has been emitted by a container.
byte[]	getStdout(JobId jobId) Get all the stdout that has been emitted by a container.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

create

public static InMemoryLogStreamFollower create()

getStdout

public byte[] getStdout(JobId jobId)

Get all the stdout that has been emitted by a container.

Parameters:

jobId - The JobId for the container in question.

Returns:

A byte array of everything written to stdout.

getStderr

public byte[] getStderr(JobId jobId)

Get all the stderr that has been emitted by a container.

Parameters:

jobId - The JobId for the container in question.

Returns:

A byte array of everything written to stderr.

followLog

public void followLog(JobId jobId,
                      String containerId,
                      Iterator<com.spotify.docker.client.LogMessage> logStream)
               throws IOException

Description copied from interface: LogStreamFollower

Follows the specified log stream until it doesn't have any more log messages available.

Specified by:

followLog in interface LogStreamFollower

Parameters:

jobId - the job id that the log stream belongs to

containerId - the container id that the log stream belongs to

logStream - the log stream to follow

Throws:

IOException - if an exception occurred