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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.provision.restapi.v2;
import com.yahoo.component.Version;
import com.yahoo.config.provision.DockerImage;
import com.yahoo.io.IOUtils;
import com.yahoo.slime.Inspector;
import com.yahoo.slime.Type;
import com.yahoo.vespa.config.SlimeUtils;
import com.yahoo.vespa.hosted.provision.Node;
import com.yahoo.vespa.hosted.provision.node.Allocation;
import com.yahoo.config.provision.NodeFlavors;
import com.yahoo.vespa.hosted.provision.node.Status;
import java.io.IOException;
import java.io.InputStream;
import java.time.Clock;
import java.util.Optional;
import java.util.Set;
import java.util.TreeSet;
/**
* A class which can take a partial JSON node/v2 node JSON structure and apply it to a node object.
* This is a one-time use object.
*
* @author bratseth
*/
public class NodePatcher {
private final NodeFlavors nodeFlavors;
private final Inspector inspector;
private final Clock clock;
private Node node;
public NodePatcher(NodeFlavors nodeFlavors, InputStream json, Node node, Clock clock) {
try {
this.nodeFlavors = nodeFlavors;
inspector = SlimeUtils.jsonToSlime(IOUtils.readBytes(json, 1000 * 1000)).get();
this.node = node;
this.clock = clock;
}
catch (IOException e) {
throw new RuntimeException("Error reading request body", e);
}
}
/**
* Apply the json to the node and return the resulting node
*/
public Node apply() {
inspector.traverse((String name, Inspector value) -> {
try {
node = applyField(name, value);
}
catch (IllegalArgumentException e) {
throw new IllegalArgumentException("Could not set field '" + name + "'", e);
}
} );
return node;
}
private Node applyField(String name, Inspector value) {
switch (name) {
case "convergedStateVersion" :
return node; // TODO: Ignored, can be removed when callers no longer include this field
case "currentRebootGeneration" :
return node.withCurrentRebootGeneration(asLong(value), clock.instant());
case "currentRestartGeneration" :
return patchCurrentRestartGeneration(asLong(value));
case "currentDockerImage" :
Version versionFromImage = Optional.of(asString(value))
.filter(s -> !s.isEmpty())
.map(DockerImage::new)
.map(DockerImage::tagAsVersion)
.orElse(Version.emptyVersion);
return node.with(node.status().withVespaVersion(versionFromImage));
case "currentVespaVersion" :
return node.with(node.status().withVespaVersion(Version.fromString(asString(value))));
case "currentHostedVersion" :
return node; // TODO: Ignored, can be removed when callers no longer include this field
case "failCount" :
return node.with(node.status().setFailCount(asLong(value).intValue()));
case "flavor" :
return node.with(nodeFlavors.getFlavorOrThrow(asString(value)));
case "hardwareFailureType" :
return node.with(node.status().withHardwareFailure(toHardwareFailureType(asString(value))));
case "parentHostname" :
return node.withParentHostname(asString(value));
case "ipAddresses" :
return node.withIpAddresses(asStringSet(value));
case "additionalIpAddresses" :
return node.withAdditionalIpAddresses(asStringSet(value));
case "wantToRetire" :
return node.with(node.status().withWantToRetire(asBoolean(value)));
case "wantToDeprovision" :
return node.with(node.status().withWantToDeprovision(asBoolean(value)));
default :
throw new IllegalArgumentException("Could not apply field '" + name + "' on a node: No such modifiable field");
}
}
private Set<String> asStringSet(Inspector field) {
if ( ! field.type().equals(Type.ARRAY))
throw new IllegalArgumentException("Expected an ARRAY value, got a " + field.type());
TreeSet<String> strings = new TreeSet<>();
for (int i = 0; i < field.entries(); i++) {
Inspector entry = field.entry(i);
if ( ! entry.type().equals(Type.STRING))
throw new IllegalArgumentException("Expected a STRING value, got a " + entry.type());
strings.add(entry.asString());
}
return strings;
}
private Node patchCurrentRestartGeneration(Long value) {
Optional<Allocation> allocation = node.allocation();
if (allocation.isPresent())
return node.with(allocation.get().withRestart(allocation.get().restartGeneration().withCurrent(value)));
else
throw new IllegalArgumentException("Node is not allocated");
}
private Long asLong(Inspector field) {
if ( ! field.type().equals(Type.LONG))
throw new IllegalArgumentException("Expected a LONG value, got a " + field.type());
return field.asLong();
}
private String asString(Inspector field) {
if ( ! field.type().equals(Type.STRING))
throw new IllegalArgumentException("Expected a STRING value, got a " + field.type());
return field.asString();
}
private boolean asBoolean(Inspector field) {
if ( ! field.type().equals(Type.BOOL))
throw new IllegalArgumentException("Expected a BOOL value, got a " + field.type());
return field.asBool();
}
private Optional<Status.HardwareFailureType> toHardwareFailureType(String failureType) {
switch (failureType) {
case "memory_mcelog" : return Optional.of(Status.HardwareFailureType.memory_mcelog);
case "disk_smart" : return Optional.of(Status.HardwareFailureType.disk_smart);
case "disk_kernel" : return Optional.of(Status.HardwareFailureType.disk_kernel);
case "unknown" : throw new IllegalArgumentException("An actual hardware failure type must be provided, not 'unknown'");
default : throw new IllegalArgumentException("Unknown hardware failure '" + failureType + "'");
}
}
}
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