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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.node.admin.task.util.systemd;
import com.yahoo.vespa.hosted.node.admin.task.util.process.TestTerminal;
import java.util.function.Consumer;
/**
* A {@link SystemCtl} tester that simplifies testing interaction with systemd units.
*
* @author mpolden
*/
public class SystemCtlTester extends SystemCtl {
private final TestTerminal terminal;
public SystemCtlTester(TestTerminal terminal) {
super(terminal);
this.terminal = terminal;
}
public Expectation expectServiceExists(String unit) {
return new Expectation(wantedReturn ->
expectCommand("systemctl list-unit-files " + unit + ".service 2>&1", 0, (wantedReturn ? 1 : 0) + " unit files listed."));
}
public Expectation expectIsActive(String unit) {
return new Expectation(wantedReturn -> {
expectCommand("systemctl --quiet is-active " + unit + ".service 2>&1", wantedReturn ? 0 : 1, "");
});
}
public Expectation expectEnable(String unit) { return forChangeEnabledState(unit, true); }
public Expectation expectDisable(String unit) { return forChangeEnabledState(unit, false); }
public Expectation expectStart(String unit) { return forChangeRunningState(unit, true); }
public Expectation expectStop(String unit) { return forChangeRunningState(unit, false); }
public SystemCtlTester expectRestart(String unit) {
expectCommand("systemctl restart " + unit + " 2>&1", 0, "");
return this;
}
public SystemCtlTester expectReload(String unit) {
expectCommand("systemctl reload " + unit + " 2>&1", 0, "");
return this;
}
public SystemCtlTester expectDaemonReload() {
expectCommand("systemctl daemon-reload 2>&1", 0, "");
return this;
}
public SystemCtlTester expectGetServiceProperty(String unit, String property, String output) {
expectCommand("systemctl show --property " + property + " --value " + unit + ".service 2>&1", 0, output);
return this;
}
private void expectCommand(String command, int exitCode, String output) {
terminal.expectCommand((useSudo() ? "sudo " : "") + command, exitCode, output);
}
private Expectation forChangeEnabledState(String unit, boolean enable) {
return new Expectation(wantedReturn -> {
expectCommand("systemctl --quiet is-enabled " + unit + " 2>&1", enable != wantedReturn ? 0 : 1, "");
if (wantedReturn)
expectCommand("systemctl " + (enable ? "enable" : "disable") + " " + unit + " 2>&1", 0, "");
});
}
private Expectation forChangeRunningState(String unit, boolean start) {
return new Expectation(wantedReturn -> {
expectCommand("systemctl show " + unit + " 2>&1", 0, "ActiveState=" + (start != wantedReturn ? "active" : "inactive"));
if (wantedReturn)
expectCommand("systemctl " + (start ? "start" : "stop") + " " + unit + " 2>&1", 0, "");
});
}
public class Expectation {
private final Consumer<Boolean> converger;
public Expectation(Consumer<Boolean> converger) {
this.converger = converger;
}
/** Mock the return value of the converge(TaskContext) method for this operation (true iff system was modified) */
public SystemCtlTester andReturn(boolean value) {
converger.accept(value);
return SystemCtlTester.this;
}
}
}
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